FIG 5.
Amino acid sequences of the protease-encoding region of viruses selected with increasing concentrations of (A) ATV, (B) DRV, (C) GRL-057-14, (D) GRL-058-14, and (E) GRL-059-14. The HIV-1NL4-3 sequence is displayed at the top of the figures as a reference. Identity with the sequence at individual amino acid positions is indicated by dots. The fractions on the right are the number of viruses from which each clone is presumed to have originated, divided by the number of clones examined. The stop codon is indicated with an asterisk (*). The selection procedures are described in the legend to Fig. 4.