... frag-ment (C3a) of the third component of human complementcontaining anaphylatoxin and chemotactic activity anddescription of an anaphylatoxin inactivator of human serum. J Exp Med 1969, 129:1109-1130.156. ... entorhinal cortex and the molec-ular layer of the dentate gyrus [106,107], systemic admin-istration of the excitotoxin kainic acid [108,109], orinjection of the neurotoxin colchicine into ... complement levels relative to other mammals [94], and (b) mouse C1q binds less effi-ciently to human Aβ than does human C1q, resulting inless activation of mouse complement than of human complement in...