title: Classical pathway activation of complement system by IgA anti-C3 antibody.
mesh_terms: D000937:Antigen-Antibody Reactions; D003176:Complement C3 / Q000378:metabolism; D003165:Complement System Proteins / Q000378:metabolism; D006801:Humans; D007070:Immunoglobulin A; D012463:Saliva / Q000276:immunology
chemical_list: D003176:Complement C3; D007070:Immunoglobulin A; D003165:Complement System Proteins