title: Oxygen-18 isotope labeling and its effect on carbon-13 chemical shifts of the peptide bond.
abstract: The effects of 18O isotopes on 13C NMR chemical shifts of peptide carbonyl carbons were found to be 0.028 ppm for glyclyglycine and 0.029 ppm for glycylproline at 50.31 MHz.
mesh_terms: D002247:Carbon Isotopes; D003903:Deuterium; D017666:Deuterium Oxide; D004151:Dipeptides / Q000138:chemical synthesis; D007553:Isotope Labeling / Q000379:methods; D009682:Magnetic Resonance Spectroscopy; D010103:Oxygen Isotopes; D014867:Water
chemical_list: D002247:Carbon Isotopes; D004151:Dipeptides; D010103:Oxygen Isotopes; D014867:Water; D003903:Deuterium; D017666:Deuterium Oxide