Nitrogen-15 NMR Spectroscopy of the Catalytic-Triad Histidine of a Serine Protease in Peptide Boronic Acid Inhibitor Complexes - Bachovchin, William W.; Wong, Winona Y.L.; Farr-Jones, Shauna; Shenvi, Ashok B.; Kettner, Charles A. (Biological Magnetic Resonance Bank, 1999)