The internal aldimine form of the wild-type Salmonella Typhimurium Tryptophan Synthase in complex with N-(4'-trifluoromethoxybenzenesulfonyl)-2-amino-1-ethylphosphate (F9F) at the enzyme alpha-site and cesium ion at the metal coordination site at 1.55 Angstrom resolution

2-({[4-(TRIFLUOROMETHOXY)PHENYL]SULFONYL}AMINO)ETHYL DIHYDROGEN PHOSPHATE
N-(4'-TRIFLUOROMETHOXYBENZENESULFONYL)-2-AMINO-1-ETHYLPHOSPHATE, F9

Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)

50 mM Bicine-CsOH, 10% PEG 8,000, 2 mM Spermine, pH 7.8

National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)

Solvent flattening and Histogram matching

Tryptophan Synthase complex (alpha2-beta2). TS is a tetramer in solution and composed of two alpha-chains and two beta-chains.