title: Isolation and characterization of the proenzyme form of the C1r subunit of the first complement component.
mesh_terms: D002482:Cellulose; D002499:Centrifugation, Density Gradient; D002852:Chromatography, Ion Exchange; D003165:Complement System Proteins / Q000032:analysis / Q000302:isolation & purification* / Q000378:metabolism; D004591:Electrophoresis, Polyacrylamide Gel; D004789:Enzyme Activation; D004792:Enzyme Precursors / Q000302:isolation & purification*; D006801:Humans; D007457:Iodine Radioisotopes; D008970:Molecular Weight; D013395:Sucrose
chemical_list: D004792:Enzyme Precursors; D007457:Iodine Radioisotopes; D013395:Sucrose; D002482:Cellulose; D003165:Complement System Proteins