title: [Preparation of C4 antiserum and detection of complement C4 activation in plasma with crossed immunoelectrophoresis].
mesh_terms: D003167:Complement Activation; D003181:Complement C4 / Q000032:analysis* / Q000276:immunology; D006801:Humans; D007106:Immune Sera; D007123:Immunoelectrophoresis, Two-Dimensional; D008175:Lung Neoplasms / Q000276:immunology; D008180:Lupus Erythematosus, Systemic / Q000276:immunology
chemical_list: D003181:Complement C4; D007106:Immune Sera