7 of the 9 im patients with detectable circulating anti-ebv ctl carried the hla-a1 antigen , whereas none of the 16 im patients lacking detectable peripheral ctl were hla-a1 positive ( mean specific lysis of t5-1 target cells by t cells from hla-a1 positive patients : 29.3 vs .
C0024264
ctl
C0021345
im