title: Studies on the precursor form of the first component of complement--I. Isolation of the proenzyme forms of Clr and Cls.
mesh_terms: D002846:Chromatography, Affinity / Q000379:methods; D003172:Complement C1 / Q000302:isolation & purification*; D004792:Enzyme Precursors / Q000302:isolation & purification*; D008970:Molecular Weight
chemical_list: D003172:Complement C1; D004792:Enzyme Precursors