title: Crystalline ribonuclease from bull semen.
mesh_terms: D000818:Animals; D002417:Cattle; D002845:Chromatography; D003460:Crystallization; D004586:Electrophoresis; D007120:Immunochemistry; D005779:Immunodiffusion; D008297:Male; D008722:Methods; D012260:Ribonucleases; D012661:Semen / Q000201:enzymology*; D014461:Ultracentrifugation
chemical_list: D012260:Ribonucleases