Recent studies have suggested that certain classes of endogenous retroviruses (ERVs) may be present in cattle. The aim of this study was increase the scope of knowledge regarding bovine ERVs. The ovine ERV β1 pro/pol sequence was used to design a primer set for polymerase chain reaction (PCR) amplification of a similar sequence in the bovine genome. Through phylogenetic and bioinformatic analysis of the PCR product sequence together with its flanking region, a sequence 8107 bp in length was characterized. This sequence had a typical 5'-LTR-gag-pro-pol-env-LTR-3' organization, and phylogenetic investigation defined it as a bovine ERV β1. Thus, we were able to identify a novel bovine endogenous retrovirus element.
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