FIG. 1.
HIV-1 vectors and segments of provirus DNA amplified to examine recombination rate. HIV-gptHXB2 is based upon HIV-1 strain HXB2 (29). HIV-puroBCSG3 is based upon HIV-1 strain BCSG3 (14, 49). SV-gpt represents the SV40 early promoter driving expression of the gpt gene. SNV-puro represents the SNV U3 promoter controlling puro gene expression. Segments 1 to 10 are different segments of amplified provirus DNA. The coordinates of the amplified segments are as follows: 1, 611 to 1283; 2, 1261 to 2049; 3, 2028 to 2820; 4, 2801 to 3665; 5, 3547 to 4415; 6, 4271 to 5066; 7, 4932 to 5797; 8, 5778 to 6390; 9, 7635 to 8454; 10, 8336 to 9156 (sequence coordinates according to the HXB2 provirus sequence).