some sera from normal donors ( 1/18 ) and from leukaemic patients ( 2/7 with acute myeloid leukaemia [ aml ] , 1/4 with chronic lymphatic leukaemia [ cll ] , 0/3 with acute lymphoblastic leukaemia [ all ] ; with high numbers of leukaemic cells expressing ia-like p28,33 antigen on the leukaemic cell surface ) inhibited the complement mediated cytotoxic activity of highly specific xenogenous anti ia-like sera ( which were prepared by immunization of rabbits with insoluble membrane fractions of b-type lymphoid lines ) at a titre 1:4 or less .
C0023467
acute
C1517806
leukaemic cells