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. 2014 Oct 14;9(10):e109771. doi: 10.1371/journal.pone.0109771

Figure 5. Correlation between charged amino acids at Env positions 322/440 and coreceptor usage for phenotypically characterized C-HIV, D-HIV and AE-HIV strains.

Figure 5

Values represent the percentage of R5 or CXCR4-using Envs within C-HIV (A), D-HIV (B) and AE-HIV (C) subtypes that have the indicated type of amino acid (+, positively charged; −, negatively charged; o, neutral) at position 440 out of all Envs with the indicated type of amino acid at position 322. Subscript values represent the percentage of R5 or CXCR4-using Envs within each subtype that have the indicated combination of amino acid types at positions 322/440. Amino acids are colored according to charge, as described in the legend for Figure 1.