Figure 1
From: Molecular and phylogenetic analysis of HIV-1 variants circulating in Italy
Analysis of DNA fragments obtained by nested PCR on the C2-V5 env (A) and the p17 gag (B) genes of HIV-1. Examples of specific env fragments of 666 bp (panel A) and gag fragments of 474 bp (panel B), obtained by nested PCR have been separated on a 1% agarose gel. M = λ/Hind III, C1 = I round negative control; C2 = II round negative control; + = positive control.