... Pictet–Spenglerreaction and alleviation by T15A mutation on intertwinedN-terminal armSeung-Goo Lee1, Seung-Pyo Hong2, Do Young Kim1, Jae Jun Song1, Hyeon-Su Ro3andMoon-Hee Sung2,41 ... truncation ofthe N-terminal arm, resulting in a monomeric nonfunc-tional conformation [22]. Meanwhile, structural studiesof Proteus vulgaris TNA have revealed an intimatecorrelation between ... PAGEanalysis after induction with 1 mm isopropyl thio-b-d-galactoside (IPTG). Based on ammonium sulfateprecipitation between 50 and 70% saturation, followed by ion exchange and hydrophobic...