The reverse transcriptase - RNA dependent DNA polymerase of Bovine Leu
kemia Virus (BLV) was isolated and characterized. The enzyme has a mol
ecular weight of about 80kd and the isoelectric point is 7.6. The enzy
me prefers magnesium, as a divalent cation using synthetic homopolymer
ic template primer poly (C) oligo (dG). Monoclonal antibodies directed
against reverse transcriptase of human immunodeficiency virus type I
(HIV-I) did not crossreact with the isolated polymerase.