... Box H, Providence, Rhode Island 02912-9108, United States. Biochemistry , 2013, 52 (31), pp 5247 ... substrate analogue [Köksal, M., Chou, WKW, Cane, DE, Christianson, DW (2012) Biochemistry 51, 3011 ... MSD instrument (70 eV, electron impact), a 1 mL injection volume, and ...