when tested against hl60 , a natural killer ( nk ) -resistant tumor cell line , not only were total cytolytic units greatly increased in okt3 + il2-stimulated cultures by lytic activity on a per cell basis ( lytic units/1 x 10 ( 6 ) cells ) had also markedly increased on day 14 of culture .
C1536403
cytolytic
C0007634
cells