title: Letter: C1 inactivation from cancer cells.
mesh_terms: D002462:Cell Membrane / Q000276:immunology; D002478:Cells, Cultured; D003169:Complement Inactivator Proteins; D003470:Culture Media; D006801:Humans; D007122:Immunoelectrophoresis; D009369:Neoplasms / Q000276:immunology*
chemical_list: D003169:Complement Inactivator Proteins; D003470:Culture Media