title: The imine-pyridine torsion of the pyridoxal 5'-phosphate schiff base of aspartate aminotransferase lowers its pKa in the unliganded enzyme and is crucial for the successive increase in the pKa during catalysis
authors.initials: H
authors.lastname: Hayashi
authors.initials: H
authors.lastname: Mizuguchi
authors.initials: H
authors.lastname: Kagamiyama