A) Schematic illustrating the location of the RNase H cleavage sites in the RNA template.
B) Representative autoradiogram of the RNase H cleavage activity of the WT and mutant HIV-1 RTs. Experiments were carried out as described in the Materials and Methods. The reaction times were 1, 3, 5, 10, 20, 30, 45, 60 and 90 min.