Personal-Education

Experience

Professional Membership

Professional Reviewer

Fellowships, Grants, Awards

Presentations

Publications Abstracts

Publications Monographs

Peer Reviewed Publications

Master & Senior Thesis Mentor

Post Doctoral Mentor

Grad. Thesis Committee

Graduate Thesis Advisor

Publications

Conference Abstracts:

Stuy, J.H., and R. B. Walter (1981) "Transfer of chromosomally integrated plasmids in Haemophilus influenzae." In: Molecular Biology and Ecology of Bacterial Plasmids. S. Levy, R. Clowes, and E. Koeing (eds.), Plenum Press, New York, N.Y.

Walter, R. B., Pierce, J., Case, R. and M.S. Tang (1988). The anthramycin-N2-guanine DNA adduct is recognized by the UVRABC nuclease in vitro. Journal of Cellular Biochemistry suppl. 12A, Alan A. Liss Press, New York, N.Y.

Walter, R.B., and J.H. Stuy (1988). Haemophilus influenzae high efficiency transforming markers are low efficiency when assayed on mutB1 mutant recipients. Proceedings of the 9th European Meeting on Genetic Transformation.

Nairn, R.S., Walter, R.B., Svensson, R., Morizot, D.C. (1988) Classical gene mapping using DNA RFLPs in Xiphophorus hybrids. Isozyme Bulletin.

Walter, R.B., Svensson, R., Harless, J., Kallman, K., Morizot, D.C., and R.S. Nairn (1989) Mapping of DNA repair genes in Xiphophorus fishes. Isozyme Bulletin.

Walter, R.B., Obermoeller, R., Svensson, R., Harless, J., Morizot, D., and R.S. Nairn (1990) RFLP mapping of an ERCC2-like gene in Xiphophorus fishes. Abstracts of the Texas Genetics Society, Dallas, TX

Raabe, T., Walter, R.B., Koke, J. (1990) Localization of Exogenous Prokaryotic DNA Taken Up by Skeletal and Cardiac Muscle Cells In Vivo. Abstracts of the Texas Society for Electron Microscopy.

Walter, R.B., Coats, T., Morton, K., and J.H. Stuy (1990) Sensitivity of high efficiency markers in genetic transformation of Haemophilus influenzae mutB1 mutants is due to a defective DNA helicase. Abstracts of the Texas Genetics Society, Dallas, TX

Obermoeller, D., Svensson, R., Harless, J., Nairn, R., Morizot, D. and R.B. Walter (1991) Mapping of an XRCC-like DNA sequence in Xiphophorus fishes. Isozyme Bulletin.

Obermoeller, D., Svensson, R., Harless, J., Nairn, R., Morizot, D., and R B. Walter (1991) RFLP mapping of human DNA repair gene homologues in Xiphophorus fishes. Abstracts of the Texas Genetics Society, Houston, TX

Obermoeller, D., Nairn, R., Morizot, D., and R B. Walter (1991) Isolation and Partial Characterization of an XRCC-Like gene in Xiphophorus fishes. Abstracts of the Texas Academy of Sciences.

Morton, K., Coats, T., Stuy, J., and R B. Walter (1991) DNA Sequence Determination of the Haemophilus influenzae mutB+ gene Suggests in Codes for a DNA Helicase. Abstracts of the Texas Academy of Sciences.

Della Coletta, L., Nairn, R.S., Svensson, R., Morizot, D.C., and R.B. Walter (1991) RFLP Mapping of an ERCC2-Like Gene in Xiphophorus Fishes. Abstracts of the Texas Academy of Sciences.

Fossey, S., Obermoeller, D., Nairn, R.S., Harless, J., and R.B. Walter (1991) DNA Sequence Determination of a Human c-MEL Sequence and Use of This to Establish a MEL RFLP in Xiphophorus Fishes. Abstracts of the Texas Academy of Sciences.

Morton, K., Coats, T., Stuy, J., and R B. Walter (1991) Cloning, characterization, and base sequence of the Haemophilus influenzae mutB+ gene. Abstracts of the Texas Genetics Society, Houston, TX

Walter, R.B., Della Coletta, L., Harless, J., Morizot, D., Nairn, R., Rolig, R., Fossey, S., S. Sefcik, S., Kozak, K., and J. Vivekananada. (1991) Preliminary characterization of the ERCC2L1 locus in Xiphophorus fishes. Abstracts of the Lost Pines Conference on Molecular Biology, M.D.-Anderson Cancer Center, Smithville, TX.

Toliver, T., Raabe, T., R. Walter, and J. Koke (1991) Location and Expression of DNA Taken Up by Myocytes In Situ. Abstracts of the American Physiological Society.

Raabe, T., Hamby, R., Walter, R.B., Koke, J. (1991) Exogenous DNA is Taken Up by Skeletal and Cardiac Myocytes In Vivo. Abstracts , Federation of American Experimental Biology (FASEB).

Raabe, T., Hamby, R., Walter, R.B., Koke, J. (1991) Exogenous DNA is Rapidly Taken Up by Skeletal and Cardiac Myocytes In Vivo. Abstracts of Texas Academy of Sciences.

Della Coletta, L., Rolig, R., Kozak, K., Nairn, R., Morizot, D., and R. B. Walter (1992) Isolation and Partial Characterization of the Xiphophorus ERCC2L1 Gene. Abst. of the Texas Academy of Science.

Fossey, S., Rolig, R., Sefcik, S., and R. B. Walter (1992) Molecular Cloning and Partial DNA sequence of the Xiphophorus maculatus ß-actin gene. Abst.of the Texas Academy of Science.

Walter, R.B., Fossey, S., Kozak, K., and R. Rolig (1992) Electroporation of Japanese Killifish (Oryzias latipes) Embryos in the Production of Transgenic Fish. Abstracts of the Texas Academy of Science.

Toliver, T., Rolig, R., R. Walter, and J. Koke (1992) Detection and localization of human superoxide dismutase in rat myocardium by injection of DNA. Abstracts of the Texas Society for Electron Microscopy, Austin, TX.

Della Coletta, L., Nairn, R.S., Morizot, D.C., and R. B. Walter (1993) Nucleotide sequence of the Xiphophorus ERCC2 DNA repair gene. Abstracts of the Texas Genetics Society., Galveston, TX.

Fossey, S., Rolig, R., and R. B. Walter (1993) Cloning, nucleotide sequence analysis and expression of the Xiphophorus ß-actin gene. Abstracts of the Texas Genetics Society., Galveston TX.

Della Coletta, L and R. B. Walter (1993) Cloning and sequence analysis of the Xiphophorus ERCC2 Gene. Abstracts of the Texas Academy of Science, Denton, TX.

Fossey, S., Rolig, R., and R. B. Walter (1993) Cloning and sequence analysis of the Xiphophorus ß-actin Gene. Abstracts of the Texas Academy of Science, Denton, TX.

Tuley, T., Kozak, K., Fossey, S., and R. B. Walter (1993) Isolation and preliminary analysis of the Xiphophorus uracil-N-glycosylase nucleotide sequence. Abstracts of the Texas Academy of Science, Denton, TX.

Walter, R.B., Rolig, R., Kozak, K., and N. Elerian (1993) Isolation and preliminary analysis of the Xiphophorus DNA ligase 1 nucleotide sequence. Abstracts of the Texas Academy of Science, Denton, TX.

Schlickeisen, E., Fossey, S., Rolig, R., Walter, C., Hoog, T., and R. B. Walter (1993) Development of techniques for production transgenic fishes in two model organisms: Micropterus salmoides and Oryzias latipes. Abstracts of the Texas Academy of Science, Denton, TX.

Tuley, T., Rolig, R., Kozak, K., Nairn, R.S., Morizot, D.C., and R. B. Walter (1994) Characterization and mapping of the Xiphophorus Uracil-N-Glysosylase gene. Abstracts of the Texas Genetics Society., Galveston, TX.

Walter, R.B., T. Tuley, L. Della Coletta, R. Rolig, S. Fossey, R. S. Nairn, and D. C. Morizot (1994) Characterization of DNA repair genes in the fish Xiphophorus. Photochemistry & Photobiology
59: 66S.

Nairn, R., McEntire, B., Della Coletta, L., Lund, J., Walter, R., and D. Morizot (1995) Genetic analysis of UV-B induced melanoma formation in interspecies genetic hybrids of Xiphophorus fish: A model for environmental UV carcinogenesis. Photochemistry and Photobiology 61: 7S

Intano, G.W., Walter, R.B., McCarey, J.R., and C. A. Walter (1996) Spontaneous mutation frequencies during spermatogenesis in transgenic mice. Abstracts of the Texas Genetics Society, Austin, TX.

Braden, A. R., Gilmer, S., Obermoeller, R. D., Morizot, D. C., Nairn, R. S., and R.B. Walter (1996) Characterization and mapping of Xiphophorus fish c-jun and junB homologues. Abstracts of the Texas Genetics Society., Austin, TX.

Li, H-Y., Obermoeller, R. D., Lacson, J. M., and R.B. Walter (1996) Investigation of the inheritance of methylation patterns in interspecies hybrids of Xiphophorus fishes. Abstracts of the Texas Genetics Society, Austin, TX.

Sung, H-M., Walter, C.A., Obermoeller, R. D., Lacson, J. M., and R.B. Walter (1996) Characterization of O6-methylguanine DNA methyltransferase (O6MGT) DNA repair activity in Xiphophorus fishes. Abstracts of the Texas Genetics Society, Austin, TX.

Kazianis, S., Nairn, R.S., McEntire, B., Della Coletta, L., Walter, R.B., and D.C. Morizot (1996) Localization of the Xiphophorus DIFF tumor suppressor gene correlates with position of a CDKN2-like gene and is associated with UV-induced melanoma formation. Cold Spring Harbor Symposium on Cancer Genetics & Tumor Suppressor Genes, Cold Spring Harbor, N.Y.

Kazianis, S., Nairn, R.S., McEntire, B., Della Coletta, L., Walter, R.B., and D.C. Morizot (1996) Linkage map localization of the Xiphophorus DIFF melanoma tumor suppressor gene correlates with the map position of a CDKN2-like gene. Abstracts of the Lost Pines Conference on Molecular Biology, M.D.-Anderson Cancer Center, Smithville, TX.

Sung, H-M., Walter, C.A., and R.B. Walter (1997) O6-methylguanine DNA methyltransferase and base excision DNA repair activity in Xiphophorus fishes. Abstracts of the Texas Genetics Society, Austin, TX.

Intano, G., C.A. Walter, J. McCarrey, and R. B. Walter (1997) A decline in Mutation Frequency Occurs During Murine Spermatogenesis 9th International Conference on Genes, Gene Families and Isozymes. San Antonio, TX

Kazianis, S., Morizot, D.C., McEntire, B.B., Della Coletta, L., Walter, R.B., and R.S. Nairn (1997) Cloning of a Xiphophorus CDKN-2-Like gene; Comparative structure to other known gene family members and genetic mapping in hybrid fish. 9th International Conference on Genes, Gene Families and Isozymes. San Antonio, TX

Walter, R.B. and H-Y. Li (1997). Inheritance of Methylation Patterns in Fishes: Stability of Pattern Inheritance in Inter-species Xiphophorus Hybrids and During Oryzias (Medaka) Early Development. 9th International Conference on Genes, Gene Families and Isozymes. San Antonio, TX

Morizot, D.C., Kaszianis, S., Nairn, R.S. and R. B. Walter (1997) Gene mapping in fishes: Reconstructing the genome of the vertebrate ancestor. 9th International Conference on Genes, Gene Families and Isozymes. San Antonio, TX

Intano, G., R.B. Walter, J. McCarrey, A. McMahan, and C.A. Walter (1997) "A decline in Mutation Frequency Occurs During Murine Spermatogenesis". Lost Pines Conference on Molecular Biology, Smithville, TX

Walter, R.B., and H-Y. Li (1998) "Inheritance of Methylation Patterns in Fishes: Stability of Pattern Inheritance in Inter-species Xiphophorus Hybrids and during Oryzias (medaka) Early Development". National Institute of Environmental Health Sciences (NIEHS) Workshop on "Unique Marine/Freshwater Models for Environmental Health Research". Durham, N.C., March 20-21, 1998

Huang-Mo Sung, Christi A. Walter, and Ronald B. Walter (1998). "O6-Methylguanine-DNA-Methyltransferase and Base Excision DNA Repair Activity in Xiphophorus Fishes". National Institute of Environmental Health Sciences (NIEHS) Workshop on "Unique Marine/Freshwater Models for Environmental Health Research". Durham, N.C., March 20-21, 1998

Morizot, D.C., Kazianis, S., Nairn, R.S. and R. B. Walter (1998) Conservation of Gene maps in Xiphophorus and Other Teleost Fishes. National Institute of Environmental Health Sciences (NIEHS) Workshop on "Unique Marine/Freshwater Models for Environmental Health Research". Durham, N.C., March 20-21, 1998

Nairn, R., S. Kazianis, B. Santi, D. Morizot and R.B. Walter (1998) A CDKN2 Gene Associated with Melanoma Susceptibility in Xiphophorus Hybrid Fish: Characterization of Genomic Structure and Expression in Tumors. National Institute of Environmental Health Sciences (NIEHS) Workshop on "Unique Marine/Freshwater Models for Environmental Health Research". Durham, N.C., March 20-21, 1998

Intano, G. W., C. A. Walter, J. R. McCarrey, C. A. McMahan, and R. B. Walter (1998) "Reduction in Mutation Frequency During Murine Spermatogenesis is Abrogated Nonlinearly with Age". Genetics Society of America, Conference on "DNA Repair: Bacteria to Humans, Airlie, V.A,. April 16-19, 1998.

Huang-Mo, S. C. A. Walter, and R.B. Walter (1998) "O6-Methylguanine-DNA-Methyltransferase & Base Excision DNA Repair Activity in Xiphophorus Fishes". Lost Pines Conference on Molecular Biology, Smithville, TX.

Intano, G. W., R.B. Walter, J. R. McCarrey, C. A. McMahon, and C. A. Walter (1998) “Mutation Frequency Declines During Spermatogenesis in Young Mice but Increases in Old Mice”, Lost Pines Conference on Molecular Biology, Smithville, TX

Walter, R.B., Meador, J.A., Sung, H-Mo., Mitchell, D.L. (1999) Nucleotide and Base Excision Repair in Xiphophorus fishes. American Society Microbiology. Conference on DNA Repair and Mutagenesis, Hilton Head, SC.

Daniels, C., Rains, J.D., Della Coletta, L., Kazianis, S., McIntire, B., Nairn,R., Morizot, D., and R. Walter (2000) Nucleotide Sequence of Cyclophilin 40 and Mapping of Two Cyclophilin-like loci in Xiphophorus Fish. Abstracts of the 27th Annual Texas Genetics Society, Houston, TX.

Kelnar, K., Rains, J. D., Kazianis, S., Nairn, R., and R. Walter (2000) Partial Characterization and Mapping of a Xiphophorus Fish RAB Gene. Abstracts of the 27th Annual Texas Genetics Society, Houston, TX.

Wheeler, A, Rains, J. D., Daniels, C., Kelnar, K., and R. Walter (2000) Partial Nucleotide Sequence Determination and Mapping of a Xiphophorus Fish NF1 Gene Homologue. Abstracts of the 27th Annual Texas Genetics Society, Houston, TX.

Intano, G. W., McMahan, A., McCarrey, J.R., Walter, R.B., and C.A. Walter (2000) DNA Base Excision Repair: Soma Versus Germline. Abstracts of the 27th Annual Texas Genetics Society, Houston, TX.

Kazianis, S., Morizot, D.C., Johnston, D.A., Gimenez-Conti, I., Fuller, B., Walter, R.B., Nairn, R.S. (2000) Molecular Genetics of Xiphophorus Fish Melanoma Models. 9th Meeting of the Pan American Society for Pigment Cell Research, College Station, Texas.

Gimenez-Conti, I., Kazianis, S., Morizot, D.C., Nairn, R.S. and R.B. Walter (2000) A New Xiphophorus Inter-species Tumor. 9th Meeting of the Pan American Society for Pigment Cell Research, College Station, Texas.

Nairn, R.S., Kazianis, S., Della Coletta, L., Trono, D., Walter, R.B., and D.C. Morizot. (2000) Genetic Analysis of Susceptibility to UV Carcinogenesis in Xiphophorus Hybrid Fish. NIH/NCI-SWT International Conference & Workshop on "Aquaria Fish Models of Human Disease", September 21-24, San Marcos, TX.

Kazianis, S., Gimenez-Conti, I., Trono, D., Pedroza, A., Chovanec, L., Mnorizot, D.C., Nairn, R.S., and R.B. Walter. (2000) Genetic Analysis of MNU Induced Neoplasia Within Xiphophorus Hybrid Fish. NIH/NCI-SWT International Conference & Workshop on "Aquaria Fish Models of Human Disease", September 21-24, San Marcos, TX.

D..C. Morizot, Walter, R.B., Nairn, R.S., and S. Kazianis. (2000) The Xiphophorus Gene Map: Beginnings of Comparative Gene Mapping in Fishes. NIH/NCI-SWT International Conference & Workshop on "Aquaria Fish Models of Human Disease", September 21-24, San Marcos, TX.

Kirchner, J., Ivanova, V., Samson, A., Volff, J-N., Noskov, V., Resnick, M., and R.B. Walter. (2000) Yeast Artificial Chromosomes (YACs) Constitute Important Tools for the Analysis of Complex Genomes. NIH/NCI-SWT International Conference & Workshop on "Aquaria Fish Models of Human Disease", September 21-24, San Marcos, TX.

Giminez-Conti, I., Woodhead, A., Harshbarger J.C., Kazianis, S., Setlow, R., Nairn, R.S., and R.B. Walter. (2000) Histopathology of the Xiphophorus Fish Model. NIH/NCI-SWT International Conference & Workshop on "Aquaria Fish Models of Human Disease", September 21-24, San Marcos, TX.

Walter, R.B., Fuller, B.F., Hazlewood, L., Roschards, J., Kazianis, S., and D. Johnston (2000) The Xiphophorus Genetic Stock Center. NIH/NCI-SWT International Conference & Workshop on "Aquaria Fish Models of Human Disease", September 21-24, San Marcos, TX.

Walter, R.B., Sung, H-M., Intano, G.W., and C. A. Walter (2000). Repair of DNA Alkylation Damage in Xiphophorus Fish and Hybrids. NIH/NCI-SWT International Conference & Workshop on "Aquaria Fish Models of Human Disease", September 21-24, San Marcos, TX.

Mitchell, D.L., Byrom, M.M., Meador, J.A., and R.B. Walter (2000) Resolution of UV Photodamage in Xiphophorus Fishes. NIH/NCI-SWT International Conference & Workshop on "Aquaria Fish Models of Human Disease", September 21-24, San Marcos, TX.

Byrom, M.M., R.B. Walter, and D.L. Mitchell (2000) Determination of DNA Damage and Repair Phenotypes in Various Xiphophorus Fishes Exposed to FS20 Sunlamps. NIH/NCI-SWT International Conference & Workshop on "Aquaria Fish Models of Human Disease", September 21-24, San Marcos, TX.

Daniels, C., Rains, J.D., Della Coletta, L., Kazianis, S., McIntire, B., Nairn, R., Morizot, D., and R.B. Walter. (2000) Characterization, Mapping and Relative Expression of the Xiphophorus maculatus Cyclophilin 40 Gene. NIH/NCI-SWT International Conference & Workshop on "Aquaria Fish Models of Human Disease", September 21-24, San Marcos, TX.

Wheeler, A., Rains, J.D., Daniels, C., Kazianis, S., Morizot, D., and R.B. Walter (2000) Partial Nucleotide Sequence, Mapping, and Relative Expression of a Xiphohorus Fish NF1 Gene. NIH/NCI-SWT International Conference & Workshop on "Aquaria Fish Models of Human Disease", September 21-24, San Marcos, TX.

Daniels, C., Rains, J.D., Della Coletta, L., Kazianis, S., McIntire, B., Nairn, R., Morizot, D., and R.B. Walter. (2000) Nucleotide Sequence, Mapping and Relative Expression of the Xiphophorus maculatus Cyclophilin 40 Gene. S.A.C.N.A.S. National Conference, October, Atlanta, GA.

Gabriel W. Intano, Eun-Ju Cho, C. Alex McMahan, John R. McCarrey, Ronald B. Walter, Mark M MacInnes, and Christi A. Walter. (2001) DNA Base Excision Repair Declines in Somatic Tissues and Male Germ Cells with Age. UTHSC-SA, Graduate Student Forum, San Antonio, TX

Kelnar, K., Rains, D., Kazianis, and R. Walter (2001) Characterization and Mapping of a Xiphophorus Fish RAB27 Gene. Abstracts of the 28th Annual Texas Genetics Society, March 1-3, San Antonio, TX.

Daniels, C., Rains, J.D., Della Coletta, L., Kazianis, S., McIntire, B., Nairn,R., Morizot, D., and R. Walter (2001) Nucleotide Sequence, Mapping and Relative Expression of the Xiphophorus maculatus Cyclophilin-40 Gene (PPID). Abstracts of the 28th Annual Texas Genetics Society, March 1-3, San Antonio, TX.

Wheeler, A, Rains, J. D., Daniels, C., Kazianis, S., and R. Walter (2001) Partial Nucleotide Sequence, Mapping and Relative Expression of a Xiphophorus Fish NF1 Gene. Abstracts of the 28th Annual Texas Genetics Society, March 1-3, San Antonio, TX.

Kazianis, S., Vielkind, J., Woolcock, B., Morizot, D., Wigler, M., Lucito, R., Nairn, R., Pedroza, A., Hollek, L., Hazlewood, L., Walter, R.B., and K. Kallman. (2002). Sex-determination in Platyfish and Swordtails. II International Symposium on Livebearing Fishes. Queretaro, Mexico, March 19-23.

Hazlewood, L., Kazianis, S., Richards, J., Pedroza, A., and R.B. Walter, R.B. (2002). The Xiphophorus Genetic Stock Center. II International Symposium on Livebearing Fishes. Queretaro, Mexico, March 19-23.

Kazianis, S., Rains. J.D., Hollek, L., Guerra, T., Russell, J., Hornecker, J., Kumar, J., Johnston, D., Morizot, D., Nairn, R., and R.B. Walter (2002). Utilization of Gene Mapping in Xiphophorus Hybrid Sub-Models. Abstracts of the 29th Annual Texas Genetics Society, April 18-21, South Padre Island, Texas

C.A. Walter, G.W. Intano, G. Xu, J. Huamani, C.A. McMahan, J.R. McCarrey, D.C. Herbert, and R.B. Walter (2002). Germline DNA Integrity: DNA Repair and Mutagenesis, .Gordon Research Conference on Mammalian Gametogenesis and Embryogenesis, July 1-5, Cold Spring Harbor, NY

V. A. Khanolkar1, S. Kazianis1, R. B.Walter1, R. S. Nairn2, D.Trono2, J. D. Rains1, E. L. Williams1 (2003) Study of the CDKN2D(P19) locus in Xiphophorus. Abstracts of the 30th Annual Texas Genetics Society, March 27-30, Austin, Texas

S. Kazianisa, V. A. Khanolkara, R. S. Nairnb, J. D. Rainsa, D. Tronob, R. Garciab, E. L. Williamsa and R. B. Waltera (2003)Structural organization, mapping, characterization and evolutionary relationships of CDKN2 gene family members in Xiphophorus fishes. Aquatic Animal Models of human Disease Conference, Sept. 29-Oct 2, Manassas, Va.

R.B. Walter, R.S. Nairn, M. Byrom, M. Wells, S. Heater, and D.L. Mitchell (2003) "DNA Repair in Hybrid Fish of the Genus Xiphophorus". Aquatic Animal Models of Human Disease Conference, Manassas VA. Sept. 30-Oct.4, 2003.

M. Byrom, D. Trono, M. Lowery, R.S. Nairn, R.B. Walter, and D.L. Mitchell (2003). Development and characterization of Xiphophorus cell lines. Aquatic Animal Models of human Disease Conference, Sept. 29-Oct 2, Manassas, Va.

R.B. Walter, J. D., Rains, L. P. Oehlers, and S.J. Heater (2003). Cloning and overexpression of the Xiphophorus maculatus DNA Polymerase ß. Aquatic Animal Models of human Disease Conference, Sept. 29-Oct 2, Manassas, Va.

Huang,C., Q. Dong, Ronald B. Walter, Terrence R. Tiersch. Initial studies of sperm cryopreservation of swordtail. (2003) American Fisheries Society, Louisianna Chapter Meeting, February 6, Baton Rouge, LA, USA.

Leon P. Oehlers, Sheila J. Heater, J. Douglas Rains, Melissa C. Wells, Wendi M., David, and Ronald B. Walter. (2004)  Purification and Characterization of DNA Polymerase ß from Xiphophorus maculates.  (Platform presentation, Awarded best presentation, Technician category), Abstracts of the 31st Annual Texas Genetics Society, April15-18, South Padre Island, Texas.

Leona C. Hazlewood, Rebeccca D. Bowers, Jessica N. Morgan, Steve Kazianis, and Ronald B. Walter  (2004)  Identification of Microsatellite Markers for Xiphophorus Species Differentiation and Strain Purity. (Poster Presentation) Abstracts of the 31st Annual Texas Genetics Society, April15-18, South Padre Island, Texas.

Alejandro T. Martinez, Leona C. Hazlewood, Steve Kazianis, and Ronald B. Walter (2004)  Development of a Computer Program to Manage the Genetic History of the Xiphophorus Stock Center. (Awarded best Poster, Technician category)  Abstracts of the 31st Annual Texas Genetics Society, April15-18, South Padre Island, Texas.

Shelia J. Heater, J. Douglas Rains, Melissa C. Wells, Ramiro T. Sosa, Leon P. Oehlers, Arnold Ruymgaart, Douglas E. Barth, and Ronald B. Walter  (2004).  Gene Structure and Expression of DNA Polymerase ß in Xiphophorus maculatus. (Poster Presentation) Abstracts of the 31st Annual Texas Genetics Society, April15-18, South Padre Island, Texas

Ronald B. Walter, Gabriel W. Intano, C. Alex McMahan, Kevin Kelnar, John R. McCarrey, and Christi A. Walter.  (2004).  Age Dependent Changes in Mutant frequencies and Mutation Spectra in Differentiating Mouse Spermatogenic Cells.  3rd Annual Mount Desert Island Stem Cell Symposium, August 13-15, Bar Harbor ME

Huang C., Dong Q., Tiersch T. R. (2004). Sperm cryopreservation of a live-bearing fish, the platyfish Xiphophorus couchianus. Annual meeting of the Louisiana Chapter of the Louisiana Chapter of the American Fisheries Society, February 6, Baton Rouge, Louisiana.

Christi A. Walter, Diwi Allen, Jessica Huamani, Guogang Xu, Vladimir Rotrekl, John R. McCarrey, C. Alex McMahan, Gabriel W. Intano, and Ronald B. Walter. (2004) DNA Repair in Stem and Differentiating Mouse Spermatogenic Cells.  3rd Annual Mount Desert Island Stem Cell Symposium, August 13-15, Bar Harbor ME

Eduardo O. Cen, Leon Oehlers, Walter E. Rudzinski, Ronald B. Walter. (2005) A Mass Spectrometric Method to Detect Base Excision Repair Products.  Abstracts of the 32nd Annual Texas Genetics Society, April 8-10, Dallas Texas

Arnold P. Ruymgaart, Sheila J. Heater, Leon P. Oehlers Jr., Melissa C. Wells, J. Douglas Rains, and Ronald B. Walter. (2005)  Purification and Biochemical Characterization of FEN1; a Structure Specific Endonuclease from Xiphophorus maculatus.  Abstracts of the 32nd Annual Texas Genetic Society, April 8-10, Dallas, Texas

Amy N. Perez, Leon P. Oehlers, Ronald B. Walter. (2005) Matrix-assisted laser desorption/ionization (MALDI) time-of-flight mass spectrometry of 4-sulfophenyl isothiocyanate-derivatized peptides using the sodium-tolerant matrix 2,4,6-trihydroxyacetophenone and diammonium citrate.  Abstracts of the 32nd Annual Texas Genetics Society, April 8-10, Dallas, Texas

Dong, Q., C. Haung, L. Hazlewood, R. Walter, T. Tiersch. (2005)  Attempted artificial insemination using cryopreserved sperm of live-lbearing fishes (genus Xiphophorus).  42nd meeting of the Society for Cryobiology, July 24, Minneapolis, Minnesota, USA

Edwardo O. Cen, Leon P. Oehlers, Walter E. Rudzinski, Ronald B. Walter.  (2005)  Mass Spectrometry of Base Excision Repair Products of an 8-oxoguanine Oligonucleotide.  American Society of Mass Spectrometry, June, San Antonio, Texas

Eduardo O. Cen, Leon P. Oehlers, Walter E. Rudzinski, Ronald B. Walter (2005). MALDI-TOF-Mass Spectrometric Detection of Base Excision Repair Products of an 8-oxoguanine Oligonucleotide. Aquatic Models of Human Disease Conference, Oct. 30- Nov . 2, The University of Georgia, Athens, GA

Leon P. Oehlers, Amy N. Perez, and Ronald B. Walter (2005). Matrix-assisted Laser Desorption/Ionization time-of-flight mass spectrometry of 4-sulfophenyl isothiocyanate-derivatized peptides from Xiphophorus and medaka (Oryzias latipes tissue extracts. Aquatic Models of Human Disease Conference, Oct. 30- Nov . 2, The University of Georgia, Athens, GA

Zhenlin Ju, Melissa C. Wells, and Ronald B. Walter (2005). Development and application of a 60-mer oligonucleotide medaka microarray containing over 8,000 unigene sequences. Aquatic Models of Human Disease Conference, Oct. 30- Nov . 2, The University of Georgia, Athens, GA

Sheila J. Heater, J. Douglas Rains, Melissa C. Wells, Paula A. Guerrero, and Ronald B. Walter (2005). Effect of Interspecies Hybridization on DNA Repair Gene Expression in Xiphophorus Fish. Aquatic Models of Human Disease Conference, Oct. 30- Nov . 2, The University of Georgia, Athens, GA

Ronald B. Walter (2005). Effect of Interspecies Hybridization on Xiphophorus Gene Expression. (Platform Presentation). Aquatic Models of Human Disease Conference, Oct. 30- Nov . 2, The University of Georgia, Athens, GA

Tiersch T. R., Yang H., Dong Q., Huang C., Hazlewood L., and Walter R. B. (2005) Artificial insemination using cryopreserved sperm of live-bearing fishes (Genus Xiphophorus). (Platform Presentation). Aquatic Models of Human Disease Conference, Oct. 30-Nov. 2, 2005, The University of Georgia,, Athens, Georgia.

Ronald B. Walter (2005). Modulation of Gene Expression Solely Due to Interspecies Hybridization in Xiphophorus. 39th Annual Conference on Gene Families and Isozymes, Dec. 4-10, Vieques, Puerto Rico.

Britton C. Goodale, Sandra S. Wise, Ronald B. Walter, Zhenlin Ju and John Pierce Wise Sr. (2006). “The Cytotoxicity and Genotoxicity of Hexavalent Chromium and Hypoxia in Medaka Cells.” Society of Environmental Toxicology and Chemistry Annual Meeting, November 2006.

Britton C. Goodale, Sandra S. Wise, Ronald B. Walter, Zhenlin Ju, and John Pierce Wise Sr. (2006) “The Cytotoxicity and Genotoxicity of Hexavalent Chromium and Hypoxia in Medaka Cells.” Presented at the Northeast Society of Environmental Toxicology and Chemistry (NESETAC) Annual Meeting.

Wells, Melissa., Ju, Zhenlin., Heater, Sheila., and Ronald B. Walter (2006) "Microarray Gene Expression Analyses in Japanese Medaka (Oryzias latipes) Exposed to Hypoxia". N.O.A.A., National Ocean Service (invited) conference on "Hypoxia Effects on Living Resources in the Gulf of Mexico", Tulane University, New Orleans, LA, Sept. 25-26, 2006

Perez, Amy, Oehlers, Leon, Ramos, Anita, Heater, Sheila., and Ronald B. Walter (2006) "Detection of Hypoxia-regulated Proteins in Medaka (Oryzias latipes) by Difference Gel Electrophoresis and Identification by Sequencing of Peptides using MALDI-TOF Mass Spectrometry". N.O.A.A., National Ocean Service (invited) conference on "Hypoxia Effects on Living Resources in the Gulf of Mexico", Tulane University, New Orleans, LA, Sept. 25-26, 2006

Yang H., R. B. Walter, T. R. Tiersch. (2006). "Sperm cryopreservation in live-bearing fishes of the genus Xiphophoru". III international symposium on viviparous fishes. Nov. 8-11, Morelia, Michoacán. México (Invited Speaker).

Walter, R. B., Ju, Z., Wells, M.C., Perez, A. N., Heater, S. and L. Oehlers (2006) "Development of Genomic and Proteomic Methods to Identify Hypoxia-regulated Proteins in Medaka (Oryzias latipes)". 40th Annual Conference on Gene Families and Isozymes, Dec. 10-17, Ambergris Caye, Belize.

Yang, H., Leona Hazlewood, Sheila J. Heater, Paula A. Guerrero, Ronald B. Walter and Terrence R. Tiersch. (2007). "Production of hybrid offspring from cryopreserved sperm from a live-bearing fish Xiphophorus helleri". Annual Meeting of the World Aquaculture Society, San Antonio, TX, Feb 26 - Mar 2.