phenotypically , the maturing cells acquired the t cell-specific differentiation antigens cd2 , cd3 , and cd8 , whereas immature differentiation antigens such as cd34 and leu19 as well as hla-class ii and the il-2 receptor cd25 were concomitantly down-regulated within 14 days of in vitro culture .
C0003329
t cell
C0003324
differentiation antigens