title: Heterogeneity of factor IX in therapeutic factor IX concentrates.
mesh_terms: D000818:Animals; D000941:Antigens; D001780:Blood Coagulation Tests; D005164:Factor IX / Q000276:immunology* / Q000627:therapeutic use; D006801:Humans; D007106:Immune Sera; D007123:Immunoelectrophoresis, Two-Dimensional; D011817:Rabbits
chemical_list: D000941:Antigens; D007106:Immune Sera; D005164:Factor IX