CD8α, CD8αβ, and CD11a expression of CD8⁺ T lymphocytes from a representative HIV-1 seronegative and a seropositive individual. Lymphocytes were gated according to light scatter characteristics and expression of CD8α and CD3. CD8αβ MF from both individuals showed significantly more heterogeneity than CD8α MF. CD8αβ MF was lower on the CD11a⁺ subset.