FIG. 3.
Cross-clade T-cell responses. (A) Cross-clade recognition against clade A and D (A&D) Gag, Env, and Nef proteins and cross-clade responses against all three tested proteins was calculated as a percentage of individual responders of the total number of volunteers tested (n = 177). (B) Viral sequence identities for clade A and D isolates (within and across clades) were analyzed using ClustalW tool and PSAweb programs, and results are reported as percent homology for either Gag (n = 51) or Nef (n = 44).