title: Pepsin-catalysed addition of water to a ketomethylene peptide isostere: observation of the tetrahedral species by 13C-nuclear-magnetic-resonance spectroscopy.
mesh_terms: D000818:Animals; D007659:Ketones / Q000378:metabolism; D009682:Magnetic Resonance Spectroscopy; D010434:Pepsin A / Q000378:metabolism*; D010446:Peptide Fragments / Q000378:metabolism; D013552:Swine; D014867:Water / Q000378:metabolism
chemical_list: D007659:Ketones; D010446:Peptide Fragments; D014867:Water; D010434:Pepsin A