title: Comparison of precipitating antisera against normal and abnormal factor IX.
mesh_terms: D000818:Animals; D005164:Factor IX / Q000276:immunology*; D002836:Hemophilia B / Q000097:blood / Q000276:immunology*; D006801:Humans; D005779:Immunodiffusion; D007122:Immunoelectrophoresis; D008297:Male; D009500:Neutralization Tests; D011234:Precipitins; D011817:Rabbits / Q000276:immunology
chemical_list: D011234:Precipitins; D005164:Factor IX