title: Purification of human complement subcomponent C4. C4 cleavage by C1s.
mesh_terms: D002499:Centrifugation, Density Gradient; D011232:Chemical Precipitation; D002846:Chromatography, Affinity; D002848:Chromatography, DEAE-Cellulose; D003172:Complement C1 / Q000378:metabolism*; D003181:Complement C4 / Q000302:isolation & purification* / Q000378:metabolism; D006801:Humans; D007457:Iodine Radioisotopes; D011092:Polyethylene Glycols
chemical_list: D003172:Complement C1; D003181:Complement C4; D007457:Iodine Radioisotopes; D011092:Polyethylene Glycols