FIG. 1.
Alignments of SIV envelope sequences. (A–E) The alignments of SIV envelope sequences of 20 clones of SIV239/Env251 viruses. SIV239/Env251 clones are aligned to the first 716 amino acids of SIVmac239. The alignment includes only the sequences cloned from the virus stock; the remaining sequences are identical to SIVmac239. Periods indicate conservation with the SIVmac239 sequence. Dashes indicate deletions.