Western blotting patterns of anti-C15 and anti-C9 in 4% SDS-PAGE. Cell lysates were separated by SDS-PAGE, electrophoretically transferred to nitrocellulose membranes, and probed with affinity-purified anti-C15 (A) or anti-C9 (B). Lane 1, Nalm-6; lane 2, RS4;11; lane 3, Km3; lane 4, Sem-k2; lane 5, K562; lane 6, B1.