the effect of five different reactions which activate complement ( antibody activation , reduction in ionic strength , acidification , cobra venom factor ( cof ) activation , and inulin activation ) upon normal and pnh cells was investigated , using normal serum and serum devoid of the fourth component of complement ( c4 ) activity from patients with hereditary angioneurotic edema ( hane ) as a source of complement .
C1516004
antibody
C0007634
cells