title: C1 activation by immunoglobulin and immunoglobulin antibodies.
mesh_terms: D000888:Antibodies, Anti-Idiotypic; D001665:Binding Sites; D003166:Complement Activating Enzymes / Q000378:metabolism; D003167:Complement Activation; D003172:Complement C1 / Q000378:metabolism*; D015922:Complement C1q; D006801:Humans; D007074:Immunoglobulin G / Q000378:metabolism; D007075:Immunoglobulin M / Q000378:metabolism; D007136:Immunoglobulins / Q000378:metabolism*; D011961:Receptors, Fc / Q000378:metabolism
chemical_list: D000888:Antibodies, Anti-Idiotypic; D003172:Complement C1; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D007136:Immunoglobulins; D011961:Receptors, Fc; D015922:Complement C1q; D003166:Complement Activating Enzymes