title: Synthesis of ribonuclease labelled with 13C on methionine-29.
mesh_terms: D000818:Animals; D002247:Carbon Isotopes; D002417:Cattle; D007553:Isotope Labeling / Q000379:methods; D009682:Magnetic Resonance Spectroscopy; D008715:Methionine; D012260:Ribonucleases
chemical_list: D002247:Carbon Isotopes; D008715:Methionine; D012260:Ribonucleases