spermatozoa were able to activate pmn in the presence of heat-inactivated serum ( only antibody , no complement ) , serum obtained from a patient with agammaglobulinemia ( without antibodies and only complement as opsonin ) , and in mgegta agammaglobulinemic serum ( only the alternative pathway of complement intact ) .
C0003241
antibodies
C0029122
opsonin