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Selected Publications

Peer Reviewed and Invited Publications:

Stuy, J.H. and R.B. Walter  (1981)  Addition, deletion, and substitution of long non-homologous deoxyribonucleic acid segments by genetic transformation of Haemophilus influenzae. Journal of Bacteriology  148:565-571.

Walter, R.B. and J.H. Stuy  (1982)  Ultraviolet sensitivity of the addition, deletion and replacement of long non-homologous DNA segments by genetic transformation of Haemophilus influenzaePhotochemistry and Photobiology  35:337-341.

Walter, R.B. and J.H. Stuy  (1982)  "Effect of linked point mutations on additive transformation in Haemophilus influenzae",  In: Genetic and Cellular Technology, vol I (Genetic Exchange), P. Gage (ed.), Marcel Dekker Inc., New York, N.Y.

Stuy, J.H. and R.B. Walter  (1982)  "Cloning of foreign genes in the Haemophilus influenzae  chromosome",  In: Genetic and Cellular Technology, vol I (Genetic Exchange), P. Gage (ed.), Marcel Dekker Inc., New York, N.Y.

Stuy, J.H. and R.B. Walter  (1982)  Repair of ultraviolet irradiated transforming DNA in a recA  mutant of Haemophilus influenzaePhotochemistry and Photobiology  37:391-394.

Stuy, J.H. and R.B. Walter  (1986)  Homology facilitated plasmid transfer in Haemophilus influenzaeMolecular and General Genetics  203:288-295.

Stuy, J.H. and R.B. Walter  (1986).  Effect of glycerol on plasmid transfer in genetically competent Haemophilus influenzaeMolecular and General Genetics  203:296-299.

Walter, R.B. and J.H. Stuy  (1988)  Isolation and characterization of a ultraviolet sensitive mutator mutant (mutB1) of Haemophilus influenzaeJournal of Bacteriology  170:2537-2542.

Walter, R.B., Pierce, J., Case, R., and M.-S. Tang  (1988)  Recognition of the helix-stabilizing anthramycin- N2-guanine adduct by UVRABC nuclease. Journal of Molecular  Biology  203:939-947.

Barkay, T., Chatterjee, D., Cuskey, S., Walter, R.B., Guenthner, F., and A. Bourquin  (1989)  "Bacteria and the environment".  In:  A Revolution in Biotechnology, J.L. Marx (ed.), Cambridge University Press, New York.

Morton, K., Coats, T., Walter, R.B., and J.H. Stuy  (1991)  "The predicted amino acid sequence of Heamophilus influenzae mutB1 gene suggests it codes for a DNA helicase".  In:  Proceedings of the Texas Academy of Science, D. Lokke (ed.), P.O. Box 835288, Richardson, TX. 75083.

Walter, R.B., Harless, J., Svensson, R.T., Kallman, K.D., Morizot, D.C., and R.S. Nairn  (1991)  Linkage assignment of a DNA sequence (ERCC2L1) homologous to a human DNA repair gene in Xiphophorus:: Implications for the evolutionary derivation of human chromosome 19.  Genomics 10:1083-1086.

Fossey, S., Obermoeller, R.D., Rolig, R.L., Garcia, J., Nairn, R.S., Harless, J., Morizot, D.C., and R.B.Walter   (1991)  "DNA sequence determination of a human c-MEL probe and its utilization to establish an RFLP in Xiphophorus fishes". In:  Proceedings of the Texas Academy of Science, D. Lokke (ed.), P.O. Box 835288, Richardson, TX. 75083.

Obermoeller, D., Della Coletta, L., Rolig, R., Morizot, D., and R.B. Walter  (1991)  "Preliminary characterization of the XRCC-1 locus in Xiphophorus fishes".  In:  Proceedings of the Texas Academy of Science, D. Lokke (ed.), P.O. Box 835288, Richardson, TX. 75083.

Stuy, J.H., and R.B. Walter  (1991)  Cloning, characterization, and DNA base sequence of the high-level streptomycin resistance gene strA1 of Haemophilus influenzae strain Rd.  Journal of Bacteriology  174: 5604-5608.

Narinr, K.M. , Kallman, K.D. , Walter, R. B., and D. C. Morizot  (1992)  Linkage analysis of two enzyme loci in the fish genus Poecilia (Teleostei: Poeciliidae). Cytogenetics and Cell Genetics  61:75-77.

Stuy, J.H., and R. B. Walter  (1993)  Cloning and characterization of the Haemophilus influenzae mutB+ gene.  Journal of Bacteriology  175:5265-5267.

Morizot, D.C., J. Harless, R. S. Nairn, K. D. Kallman, and R. B. Walter  (1993)  "Linkage maps of non-salmonid fishes".  In : Genetic Maps: Locus Maps of Complex Genomes, 6th Edition, Book 4: Nonhuman Vertebrates, S. J. O'Brien  (ed.), Cold Spring Harbor Laboratory Press, Cold Spring Harbor, NY. pp. 4.318-4.325.

Walter, R.B.,  R. Rolig, K. Kozak, B. McEntire, D. C. Morizot, and R. Nairn  (1993)  Cloning and Gene Map Assignment  of the Xiphophorus  DNA ligase I Gene, Molecular Biology and Evolution  10(6):1227-1238.

Walter, R.B., K. Morton, and J. H. Stuy (1993).  The nucleotide sequence of the Haemophilus influenzae mutB gene indicates it codes for a DNA helicase II.  Gene  136:35-40.

Della Coletta, L., Rolig, R.L., Fossey, S., Morizot, D.C., Nairn, R.S., and R.B. Walter  (1995)  Characterization of the Xiphophorus fish (Teleostei: Poeciliidae) ERCC2 /XPD locus.  Genomics  26:70-76.

Harless, J., R. D. Obermoeller, R. B. Walter, R. Svensson, R.S. Nairn, J.R. Vielkind, K.D. Kallman, and D. C. Morizot  (1995). Characterization of a Tyrosine Kinase-Peptidase A Synteny in Linkage Group XII of Xiphophorus (Teleostei: Poeciliidae): Implications for Vertebrate Chromosome Evolution.  Journal of Heredity   86(3): 235-240.

Otieno, T., Bond, M.R., Carrano, C.J., Walter, R.B., and L.M. Mokry  (1996)  Plasmid DNA cleavage by oxo-bridged vanadium (III) dimers without added co-oxidants or reductants. Chemical Communications 1996:37-38

Walter, R.B. and D.C. Morizot  (1996)  "Conservation of genome and gene structure from fishes to mammals".  In: Advances in Structural Biology,  S.K. Malhotra  (ed.), J.A.I. Press Inc., Greenwich, CT. vol. 4, pp. 1-24.

Nairn, R.S., Della Coletta, L., McEntire, B.B., Walter, R.B., and D.C. Morizot  (1996)  Assignment of the TP53  orthologue to a new linkage group (LG XIV) in fishes of the genus Xiphophorus (Teleostei: Poeciliidae).  Cancer Genetics and Cytogenetics  88: 144-150.

Nairn, R.S., Kazianis, S., McEntire, B., Della Coletta, L, Walter, R.B., and D.C. Morizot  (1996) A CDKN2-like Polymorphism in Xiphophorus LG V is Associated with UV-induced Melanoma Formation in Platyfish-swordtail hybrids.  Proceedings of the National Academy of Sciences (USA) 93: 13042-13047

Walter, R.B., Obermoeller, R.D., Moore, D.D., Lacson, J.M., Della Coletta, L., McEntire, B., Morizot, D.C., and R.S. Nairn  (1996).  Characterization and Mapping of a Xiphophorus maculatus  (Teleostei: Poeciliidae) Fish RPS15 (rig)gene.  Cytogenetics and Cell Genetics 75:140-144.

Williams, J.D., Kazianis, S., and R.B. Walter (1998).  Use of Random Amplified DNA (RAPD) for Identification of Largemouth Bass Subspecies and Their Intergrades.  Transactions of the American Fisheries Society 127:825-832.

Kazianis, S., Gutbrod, H., Nairn, R., McEntire, B., Della Coletta, L., Walter, R.B., Borowsky, R.L., Woodhead, A.D., Setlow, R.B., Schartl, M., and Morizot, D.C.  (1998) "Localization of a CDKN2 Gene in Linkage Group V of Xiphophorus Fishes Defines it as a Candidate for the DIFF Tumor Suppressor."  Genes Chromosomes and Cancer  22: 210-220.

Morizot, D.C., Nairn, R.S., Walter, R.B., Kazianis, S. (1998)  "Linkage Map of Xiphophorus Fishes".  ILAR Journal (NAS press), 39 (2/3):237-248.

Walter, C.A., Intano, G., McCarrey, J., McMahan, C.A. and R.B. Walter  (1998).  "Mutation Frequency Declines During Spermatogenesis in Young Mice but Increases in Old Mice". Proceedings of the National Academy of Sciences (USA) 95: 10015-10019.

Meador, J., R. Walter, and D. Mitchell.  (2000)  Induction, Distribution, and Repair of UV Photodamage in the Swordtail, Xiphophorus signum. Photochemistry & Photbiology, 72(2): 260-266.

Heater, S.J., Carrano, M.J., Rains, D., Walter, R.B., Ji, D., Yan, Q., Czernuszewicz, R.S., and C.J. Carrano (2000)  "Interaction of Oxo-Bridged Vanadium (III) Phenanthroline and Bipyridine with DNA.  Inorganic Chemistry 39: 3881-3889.

Intano, G.W., McMahon, C.A., Walter, R.B., McCarrey, J.R., and C.W. Walter (2001) Mixed Spermatogenic Germ Cell Nuclear Extracts Exhibit High Base Excision Repair Activity.  Nucleic Acids Research, 29(6): 1366-1372.

Walter, R.B., Sung, H.-M., Intano, G.W., and C.A. Walter.  (2001) Chracterization of O6-Methylguanine DNA Methyltransferase (O6MGT) DNA Repair Activity In Xiphophorus Fishes.  Mutation Research  493:11-22.

Walter, R.B., Sung, H-M., Mitchell, D.L., Intano, G.W., and C.A. Walter (2001)  Relative Base Excision Repair Activity in Xiphophorus Fish Tissue Extracts.  Marine Biotechnology  3(S1): 50-61. (Cover photo. selection)

Mitchell, D.L., Maedor, J.A., Byrom, M., and R.B. Walter  (2001)  The Resolution of DNA Damage in Xiphophorus Fishes.  Marine Biotechnology  3(S1): 61-72.

Nairn, R.S., Kazianis, S., Della Coletta, L., Trono, D., Butler, A.P., Walter, R.B., and D.C. Morizot  (2001) Genetic Analysis of Susceptibility to Spontaneous and UV Carcinogenesis in Xiphophorus Hybrid Fish.  Marine Biotechnology.  3(S1): 24-37.

Kazianis, S., Gimenez-Conti, I., Trono, D., Pedroza, A., Chovanec, L., Morizot, D.C., Nairn, R.S., and R.B. Walter  (2001)  Genetic Analysis of MNU-Induced Neoplasia within Xiphophorus Hybrid Fish.  Marine Biotechnology 3(S1): 37-44
.

Gimenez-Conti, I., Woodhead, A.D., Harshbarger, J.C., Kazianais, S., Setlow, R.B., Nairn, R.S., and R.B. Walter  (2001)  A Proposed Classification Scheme for Xiphophorus Melanomas Based on Histopathology Analyses.  Marine Biotechnology 3(S1): 100-107.

Kirchner, J., Ivanova, V., Samson, A., Noskov, V., Volff, J-N., Rsnick, M.A., and R.B. Walter (2001) Transformation Associated Recombination (TAR) Cloning of the Tumor-Inducing Xmrk2 Gene From Xiphophorus maculatus.  Marine Biotechnology. 3(S1): 168-177.

Morizot, D.C., Nairn, R.S., Simhambhatla, P., Della Coletta, L., Trono, D., Chovanec, L., Walter, R.B., and S. Kazianis  (2001)  Xiphophorus Genetic Linkage Map: Beginnings of Comparative Gene Mapping in Fishes.  Marine Biotechnology. 3(S1): 153-162.

Walter, R.B.  and S. Kazianis (2001)" Xiphophorus Interspecies Hybrids as Genetic Models of Induced Neoplasia", Journal of the Institute for Laboratory Animal Research (ILAR J., National Academy Press), Invited Review,  42(4): 299-322.

Kazianis, S, Gimenez-Conti, I., Setlow, R.B., Woodhead, A.D., Harshbarger, J.C., Trono, D., Ledesma, M., Nairn, R.S., and R.B. Walter  (2001)  MNU Induction of Neoplasia in a Novel Fish Model. Laboratory Investigation, 81(9): 1191-1198.  (Cover photo. selection)

Intano, G.W., McMahon, C. A., McCarrey, J. R., Walter, R.B., McKenna, A.E., Matsumoto, Y.,MacInnes, M.A., Chen, D.J., and C.A. Walter (2001)  Base Excision Repair is Limited by Different Proteins in Male Germ cell Nuclear Extracts Prepared from Young and Old Mice.  Molecular Cell Biol., 22(7): 2410-2418.

Kazianis, S. and R.B. Walter (2002).  Use of Platyfishes and Swordtails in Biological Research.  Lab Animal 31(3): 46-52

Walter, R.B., Li, -H-Y., Intano, G.W., Kazianis, S., and C. A. Walter  (2002).  Absence of Global Genomic Cytosine Methylation Pattern Erasure During Medaka (Oryzias latipes) Early Embryo Development.  Comp. Biochemistry & Physiology, part B, 133: 597-607.

Li, H-Y., Savage, T., Obermoeller, R., Kazianis, S. and R.B. Walter (2002).  Parental 5-Methylcytosine Patterns are Stable Upon Inter-Species Hybridization of Xiphophorus (Teleostei: Poeciliidae) Fish.  Comp. Biochemistry & Physiology, part B, 133: 581-595.

Walter, C.C., Walter, R.B., and J. R. McCarrey  (2003)  Germline Genomes:  A Biological Fountain of Youth?  Science SAGE  299: 1339,sageke.sciencemag.org.

Kallman, K.D., Walter, R. B., Morizot, D.C., and S, Kazianis  (2004)  Two new species of Xiphophorus (Poeciliidae), from the Isthmus of Tehuantepec, Oaxaca, Mexicio, with a Discussion of the Distribution of the X. clemenciae Clade.  American Museum Novitates, 3441:1-34.

Mitchell, D. L., Nairn, R. S., Johnston, D. A., Byrom, M., Kazianis, S. and R.B. Walter (2004)  Decreased Levels of DNA Excision Repair in Hybrid Fish of the Genus Xiphophorus. Photochemistry & Photobiol
ogy, 79, 447-452.

Walter, R.B., Rains, J.D., Russell, J.E., Guerra, T.M., Daniels, C., Johnston, D.A., Kumar, J., Wheeler, A., Kelnar, K., Khanolkar, V.A., Williams, E.L., Hornecker, J.L., Hollek, L., Mamerow, M.,M., Pedroza, A., and Kazianis, S. (2004)  A Microsatellite Genetic Linkage Map for Xiphophorus.  Genetics, 168:363-372.

Huang, C., Dong, Q., Walter, R.B., and T.R. Tiersch  (2004). Initial Studies on Sperm Cryopreservation of the live-bearing fish, green swordtail Xiphophorus helleri, Theriogenology 62(1-2): 179-194.

Huang, C., Dong, Q., Walter, R.B., and T.R. Tiersch  (2004). Sperm cryopreservation of green swordtail Xiphophorus helleri, a fish with internal fertilization.
Cryobiology 48(3): 295-308.

Walter, C.A., G. W. Intano, C. A. McMahon, K. Kelnar, J. R. McCarrey, J., and R. B. Walter (2004).Mutational Spectral Changes in Spermatogenic Cells Obtained from Old Mice. DNA Repair, 3: 495-504.
[Reviewed and quoted in; “Riddled with Errors: mutations mount in elderly sperm” by Shawne Neeper, Science SAGE/KE vol 2004, issue 11, pp. Nf28, March 17, 2004}

Huang, C., Dong, Q., Hazlewood, Leona, Walter, R.B., and T.R. Tiersch  (2004).  Sperm cryopresevation of a lived-bearing fish, the platyfish Xiphophorus couchianus
Theriogenology 62(6): 971-989.

Kazianis, S., Kanolkar, V., Nairn, R.S., Rains, D., Trono, D., Garcia, R., Williams, E.L., and R.B. Walter (2004) Structural organization, mapping, characterization and evolutionary relationships of CDKN2 gene family members in Xiphophorus fishes.  Comparative Physiology & Biochemistry, 138(3):291-299.

Oehlers, L.P., Heater, S.H., J., Rains, J.D., Wells, M.C., David, W.M., and R.B. Walter (2004) Gene structure, Purification, and Characterization of DNA polymerase ß from Xiphophorus maculatus. Comp. Physiol. & Biochem., 138(3):311-324.

David, Wendi M., David L. Mitchell, and Ronald B. Walter (2004)  DNA Repair in Hybrid Fish of the Genus Xiphophorus. Comparative Physiology & Biochemistry, 138(3):300-310.

Heater, Sheila H., Leon P. Oehlers Jr., J. Douglas Rains, and Ronald B. Walter (2004)  DNA Polymerase ß mRNA and Protein Expression in Xiphophorus fish. Comparative Physiology & Biochemistry, 138(3):325-334
.

Ruymgaart, Arnold, Heater, Sheila H., Oehlers Jr., Leon P., and Ronald B. Walter (2004).  Gene structure and Purification a Fappy-N-Glycosylase (FEN-1) from Xiphophorus maculatus.  Zebrafish, in press.

Kazianis, Steven, Rodney S. Nairn, Ronald B. Walter, Dennis A. Johnston, Jay Kumar, David Trono, Luis Della-Coletta, Irma Gimenez-Conti, J. Douglas Rains, Earlanda L. Williams, Madonna M. Mamerow, Kelli J. Kochan, Manfred Schartl, Juergen R. Vielkind, Jean-Nicolas Volff, Bruce Woolcock, and Donald C. Morizot  (2003) "The Genetic Map of Xiphophorus Fishes Represented by 24 Multipoint Linkage Groups".  Zebrafish, in press..

Oehlers, L.P., Perez, A.N., and R.B. Walter (2005) MALDI-TOFMS of 4-sulfophenyl isothhiocyanate-derivitized peptides on Anchor-Chip sample supports using sodium-tolerant matrix 2,4,6-trihydroxyacetophenone and diammonium citrate. Rapid Comm. Mass Spectrometry, 19(6):752-758.

Xu, Guogang, Graciela Spivak, David L. Mitchell, Toshio Mori, John R. McCarrey, C. Alex McMahan, Ronald B. Walter, Philip C. Hanawalt, Christi A. Walter (2005) Nucleotide Excision Repair Activity Changes During Murine Spermatogenesis And Is Modulated By Age, Biology of Reproduction, 73:123-130.

Ju Z., Wells, M. W., Kazianis, S., Rains, J. D. and R. B. Walter (2005). An in silico mining for simple sequence repeats from expressed sequence tags of zebrafish, medaka, Fundulus and Xiphophorus. In Silico Biol. 5, 0041 [pgs.1-16]

Walter, R.B., Kazianis, S., Hazlewood, L., Johnston, D., Kumar, J. (2005). The Xiphophorus Genetic Stock Center. In: Viviparous Fishes, M. C. Uribe and H. Grier (eds.), New Life Publications (ISBN# 0-9645058-5-1), Homestead, Fl. PP. 343-350.

Kazianis, S., Veilkind, J., Woolcock, B., Morizot, D.C., Wigler, M., Lucito, R., Nairn, R., Richards, J., Pedroza, A., Hollek, L., Hazlewood, L., Walter, R.B., and Kallman, K.D. (2005). Sex-determination in Paltyfishes and Swordtails. In: Viviparous Fishes, M. C. Uribe and H. Grier (eds.), New Life Publications (ISBN# 0-9645058-5-1), Homestead, Fl. pp. 381-400.

Yang, H., Hazelwood, L., Walter, R.B., and T.R. Tiersch (2006) Effect of immobilization on refrigerated storage and cryopreservation of sperm from green swordtail Xiphophorus helleri. Cryobiology, 52:209-218.

Heater, S.J., Rains, J.D., Braden, A.R.C., Gilmer, S.M., and R.B. Walter (2006) Cloning of JunA and JunB gene homologues and mRNA expression levels in two Xiphophorus melanoma models. Zebrafish, 3(1): 11-22.

Walter, R.B., Ju, Z., Martinez, A., Amemiya, C.T., and Samollow, P. (2006) Genomic Resources for Xiphophorus Research. Zebrafish, 3(1): 53-63.

Wood, S.R., Berwick, M., Ley, R.D., Walter, R.B., and G.S. Timmins (2006). UV Causation of melanoma in Xiphophorus Is Dominated by Melanin Photosensitized Oxidant Production. Proceedings of the National Academy of Sciences (USA), 103 (11):4111-4115.

Ju, Z., Wells, M. C., and R. B. Walter (2007). DNA microarray technology in toxicogenomics of aquatic models: methods and applications. Comparative Physiology & Biochemistry, Part C -Toxicology & Pharmacolgy, 145(1): 5-14.

Ju, Z., Wells, M.C., and R.B. Walter (2007). Multiple Tissue Gene Expression Analyses in Japanese Medaka (Oryzias latipes) Exposed to Hypoxia. Comparative Physiology & Biochemistry, Part C -Toxicology & Pharmacology, 145(1): 134-144.

Oehlers, L.P., Perez, A.N., and R. B. Walter (2007). Detection of hypoxia-related proteins in medaka (Oryzias latipes) brain tissue by difference gel electrophoresis and de novo sequencing of 4-sulfophenyl isothiocyanate-derivatized peptides by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, Comparative Physiology & Biochemistry, Part C -Toxicology & Pharmacolgy, 145(1): 120-133.

Heater, S.J., Rains, J. D., Wells, M. C., Guerrero, P. A., and R. B. Walter (2007). Perturbation of DNA repair gene expression due to interspecies hybridization, Comparative Physiology & Biochemistry, Part C -Toxicology & Pharmacolgy, 145(1): 156-163.

Yang, H., Hazelwood, L., Heater, S. J., Guerrero, P. A., Walter, R.B., and T.R. Tiersch (2007). Production of F1 interspecies Hybrid Offspring with Cryopreserved Sperm from a Live-bearing Fish, the Swordtail Xiphophorus helleri. Biology of Reproduction, 76: 401-406.

Xu, Guogang, Intano, Gabriel, McCarrey, John R., Walter, Ronald B., McMahan, Clyde A., and Walter, Christi, A. (2007) Recovery of Low Mutant Frequency After Ionizing Radiation-Induced Mutagenesis During Spermatogenesis. Mutation Research, submitted.

Yang, H., R B. Walter, and T.R. Tiersch (2007). Current Status of Sperm Cryopreservation in the Genus Xiphophorus. In: Viviparous Fishes, II M. C. Uribe and H. Grier (eds.), New Life Publications (ISBN# 0-9645058-5-1), Homestead, Fl. submitted.

Ju, Z., Wells, M.C., and R. B. Walter (2007). Microarray analyses of oviparous and viviparous fish species indicate response to hypoxia is more tissue-specific than species-specific. In preparation.