FIG. 3.

Alignment of predicted amino acid sequences of the V1 region of PCR products cloned from PBMC of PT181 at sequential time points during infection. The sequence of SIVsm62d is shown at the top of each time point. Identity at a residue is indicated with a dash, dots indicate a deletion relative to SIVsm62d, and amino acid substitutions are shown with the single-letter amino acid code. At the right is shown the frequency of the number of clones of each unique sequence type as determined by sequence and SSCP analysis.