Antigen-induced expression of CD57.

(A) Percentage of gag-specific CD8⁺ T cells that express CD57 was correlated with percentage nef, pol, or env-specific CD8⁺ T cells that express CD57, R = 0.95,P < .0001. (B). The percentage of gag-specific CD8⁺ T cells that express CD57 was correlated with the percentage of CD8⁺ T cells (specific for antigens other than HIV) that express CD57, R = 0.58, P = .003.