Fig. 2From: Defective HIV-1 envelope gene promotes the evolution of the infectious strain through recombination in vitroDetermination of recombinant patterns and breakpoints. The env genes of parent strains NL4–3 and SG3 as well as a CRF01_AE strain were used as reference sequences when performing the bootscan analysis with window size of 180 bp and step size of 10 bp using Simplot software. Position numbering is relative to the genome of HXB2. The AA142 position was red marked indicating where the nucleotide acids CTAG inserted. SP, signal peptide. FP, fusion peptide. NHR, N-terminal helix repeat region. CHR, C-terminal helix repeat region. TM, Transmembrane domainBack to article page