title: Purification of the first component of complement by zonal ultracentrifugation.
mesh_terms: D000818:Animals; D002501:Centrifugation, Zonal; D003165:Complement System Proteins / Q000032:analysis* / Q000302:isolation & purification; D004912:Erythrocytes / Q000276:immunology; D006168:Guinea Pigs; D005779:Immunodiffusion; D007122:Immunoelectrophoresis; D011817:Rabbits; D012756:Sheep
chemical_list: D003165:Complement System Proteins