to investigate potential functional changes in alloantigen-specific proliferative cd3+ , cd4+ , cd8- , leu-8- , interleukin 2 ( il 2 ) -secreting noncytotoxic in vitro primed human helper t cells , a set of 12 clones was studied sequentially throughout their finite life spans .
C0021756
interleukin 2
C0086418
human