we studied the ability of particle-bound and fluid-phase c3b monomers and monomeric amidated c3 ( prepared by treatment of purified human c3 with ammonium chloride or methylamine ) to stimulate chemiluminescence of human polymorphonuclear leukocytes ( pmn ) and monocytes and to promote phagocytosis in the absence of antibody .
C0005889
fluid
C0003241
antibody