title: Cryopreservation of sheep red blood cells. 4. Titrations of the first complement component with frozen EAC4 cells.
mesh_terms: D000818:Animals; D001793:Blood Preservation; D003172:Complement C1 / Q000032:analysis*; D004912:Erythrocytes / Q000276:immunology*; D005615:Freezing; D007202:Indicators and Reagents; D012756:Sheep / Q000276:immunology*
chemical_list: D003172:Complement C1; D007202:Indicators and Reagents