Bursal lymphomas induced in chickens by avian leukosis viruses (ALVs) harbor proviral insertions that augment expression of an adjacent cellular oncogene, c-myc. To analyze such insertionally mutagenized c-myc genes in greater detail, we isolated molecular clones from two independent tumors. Precise proviral integration has occurred within the transcribed region of the c-myc gene in both mutant...

Retrovirus genomes have a conserved modular organization that consists of trans-acting gag, pol, and env genes that function through cis-acting sequences to replicate the RNA genome to the DNA provirus. Genetically more complex retroviruses also encode regulatory genes and cis-acting sequences that are essential for their replication. We sought to convert a more complex retrovirus into a simple...

Bovine Leukosis Virus (EBLV) is a widely distributed pathogen agent in the bovine population of many countries, especially in dairy cattle. Once the bovine is infected, it remains as a virus carrier for life and such state is correlated with a specific antibody detectable level. In this study the evaluation of an indirect ELISA (Leucokit-La Plata) to detect antibodies against EBLV is presented....

in this study one lymph node from cow with viral lymphosarcoma and one lymph node from healthy cow were analyzed by three different methods for protein extraction, include simple homogenizing in pbs, sonication and phenol extraction. tumor antigen detection relies on immunoprecipitation followed by sds-page. in this experiment streptococcus pyogenes was used for purification of immune complexes...