OBLIGATE STEP. “In animal genomes, the majority of EVEs are derived from reverse transcribing RNA (rtRNA) viruses (i.e. retroviruses). Retroviruses are the only animal viruses that integrate into the genome of the host cell as an obligate step in their replication strategy, and are thus predisposed to enter the host germ line.”
https://lnkd.in/bBjWGE5