Genotypic analysis of HIV-1 Gag sequences: Boot scanning analysis of Subtype A1in HIV-1 Gag gene region. (A) isolate MBBL12 (B) isolate MBBL03 (C) isolate MBBL30 (D) isolate MBBL09. Parametrical analysis was done using the following: Window: 200 bp, step: 20 bp, gapstrip: on, reps: 100, Kimura (2-parameter), T/t: 2.0.