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Subtype B replication capacity. (A and B) Normalized replication capacities of recombinant viruses expressing Gag-protease from subtype B chronically infected patients carrying 250I (n = 5) and 250M (n = 788) (A) and NL4-3 site-directed mutants (T242N and M250I) (B). The error bars represent the standard errors for triplicate measurements.
