Here, we show that the African swine fever virus 5-HL gene is a highly
conserved, viral gene and contains all known protein domains associat
ed with Bcl-2 activity, including those involved with dimerization, me
diating cell death, and protein-binding functions, and that its protei
n product, p21, suppresses apoptotic cell death in the mammalian lymph
oid cell line FL5.12. Thus, 5-HL is a true functional viral member of
the Bcl-2 gene family.