Fas expression is increased in CD4XL-PBMC in the Bcl-2^dim population. PBMC were treated with medium, Leu3a/GAM, or PHA for 3 days and intracytoplasmic Bcl-2 staining was performed in combination with surface Fas antigen and CD3 staining. Fas expression was evaluated separately in Bcl-2^dim and Bcl-2^high cells gated on the CD3⁺ cell population.