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Articles 241 - 244 of 244
Full-Text Articles in Animal Sciences
Genetic Mapping Of Endogenous Rd-114 Retroviral Sequences Of Domestic Cats, Roger H. Reeves, William G. Nash, Stephen J. O'Brien
Genetic Mapping Of Endogenous Rd-114 Retroviral Sequences Of Domestic Cats, Roger H. Reeves, William G. Nash, Stephen J. O'Brien
Biology Faculty Articles
The RD-114 family of endogenous retroviral sequences in domestic cats has been shown to consist of approximately 20 copies of genetically divergent virogenes per haploid genome. The chromosomal localization for four endogenous sequences (RDV1-4) was accomplished by correlating the occurrence of specific feline chromosomes with diagnostic viral DNA fragments in a panel of cat x rodent somatic cell hybrids. Analysis of the hybrid panel revealed that endogenous RD-114 sequences are dispersed on multiple cat chromosomes, that certain proviral segments are polymorphic with respect to the presence or absence of virus, and that a restriction fragment characteristic of inducible RD-114 resides …
Molecular Genetic Characterization Of The Rd-114 Gene Family Of Endogenous Feline Retroviral Sequences, Roger H. Reeves, Stephen J. O'Brien
Molecular Genetic Characterization Of The Rd-114 Gene Family Of Endogenous Feline Retroviral Sequences, Roger H. Reeves, Stephen J. O'Brien
Biology Faculty Articles
RD-114 is a replication-competent, xenotropic retrovirus which is homologous to a family of moderately repetitive DNA sequences present at ca. 20 copies in the normal cellular genome of domestic cats. To examine the extent and character of genomic divergence of the RD-114 gene family as well as to assess their positional association within the cat genome, we have prepared a series of molecular clones of endogenous RD-114 DNA segments from a genomic library of cat cellular DNA. Their restriction endonuclease maps were compared with each other as well as to that of the prototype-inducible RD-114 which was molecularly cloned from …
Evidence For The Horizontal Acquisition Of Murine Akr Virogenes By Recent Horizontal Infection Of The Germ Line, Stephen J. O'Brien, Janet L. Moore, Malcolm A. Martin, James E. Womack
Evidence For The Horizontal Acquisition Of Murine Akr Virogenes By Recent Horizontal Infection Of The Germ Line, Stephen J. O'Brien, Janet L. Moore, Malcolm A. Martin, James E. Womack
Biology Faculty Articles
Several recent reports have established the biological and molecular genetic similarity between the endogenous AKV virus of strain AKR, and an N-ecotropic endogenous virus found in the genome of feral Japanese mice, Mus musculus molossinus. The similarities are so striking as to suggest a common origin of these viruses, which are present in some, but not all, inbred mouse strains. The virogenes of AKR mice may have been acquired by either: (a) common descent of AKR (and other AKV+ strains) from a common ancestor of AKR and molossinus animals, or (b) horizontal germ line infection of the AKR …
Bvr-1, A Restriction Locus Of A Type C Rna Virus In The Feline Cellular Genome: Pleiotropic Restriction Of Endogenous Balb Virus In Cat X Mouse Somatic Cell Hybrids, Stephen J. O'Brien, Janice M. Simonson
Bvr-1, A Restriction Locus Of A Type C Rna Virus In The Feline Cellular Genome: Pleiotropic Restriction Of Endogenous Balb Virus In Cat X Mouse Somatic Cell Hybrids, Stephen J. O'Brien, Janice M. Simonson
Biology Faculty Articles
Bvr-1 is a dominant X-linked feline gene which restricts the replication of B-tropic murineleukemia virus (B-MuLV) in somatic cell hybrids between murine BALB/c-RAG cells and FL-74 feline cells. Since the hybrids were originally derived by the hypoxanthine aminopterin thymidine selection scheme, counter selection experiments on 6-thioguanine result in preferential survival of hybrid cells which have spontaneously lost the feline X-chromosome on which is located the structural gene for hypoxanthine guanine phosphoribosyl transferase (IMP: pyrophosphate phosphoribosyl transferase, E.C. 2.4.2.8) and Bvr-1. Back selected Bvr-1- cells express high parental levels of B-MuLV. Bvr-1- effectively restricts the IdU-mediated induction of …