leukemic cells from a child with acute lymphoblastic leukemia ( all ) had high natural killer ( nk ) activity against k562 as determined by the 51cr release assay at a 40:1 effector : target ratio : percent lysis was 76.8 % ( 147.4 % of normal lymphocyte value ) and higher than that of control leukemic cells from 12 childhood all ( 0.1 % +/- 0.3 % ) .
C0023449
acute lymphoblastic leukemia
C0024264
lymphocyte