FIG. 6.

Amino acid sequence alignments of the V1 envelope region of the predominate clone 12 (CL12) in the prepassage SIV_B670 inoculum. This sequence persisted through the passage as the diversity of the inoculum declined (Fig. 4). The CL12 V1 sequences are compared with the sequences of clones derived from the four different passages (P1 to P4). Clone P4.3 represents the same V1 sequence found in the molecular clone, SIV_F359, and which was originally found in CL12 within the quasispecies found in the prepassage SIV_B670 inoculum.