title: Preparation and studies of  19 F-labeled and enriched  13 C-labeled semisynthetic ribonuclease-S' analogues.
mesh_terms: D002247:Carbon Isotopes; D055598:Chemical Phenomena; D002621:Chemistry; D002852:Chromatography, Ion Exchange; D003597:Cytosine Nucleotides; D005461:Fluorine; D007553:Isotope Labeling; D009682:Magnetic Resonance Spectroscopy; D010179:Pancreas / Q000201:enzymology; D010649:Phenylalanine; D012260:Ribonucleases / Q000302:isolation & purification; D013056:Spectrophotometry, Ultraviolet
chemical_list: D002247:Carbon Isotopes; D003597:Cytosine Nucleotides; D005461:Fluorine; D010649:Phenylalanine; D012260:Ribonucleases