Figure 2: Association plot of subtype A.
From: Genotypic Prediction of Co-receptor Tropism of HIV-1 Subtypes A and C

On the x-axis alignment positions of gp120 region are shown, the y-axis represents the associated p-values based on SeqFeatR. Significant changes in amino acid composition between X4 and R5 sequences (p-value < 0.01) are marked with asterisks. The variable regions V1–V5 of gp120 are drawn. The strongest associations were found in the V3 and V2 regions. Additionally, the region of V4 shows statistically significant associations to co-receptor tropism.