1.13.99.1 crystals grow from a solution containing 20 mg/ml MIOX, 20 mM myo-inositol, 50 mM Mes pH 6.0, 50 mM NaCl, 2 mM Tris(2-carboxyethyl)-phosphine hydrochloride and 4.4 M sodium formate 676819 1.13.99.1 in complex with myo-inosose-1 bound in a terminal mode to the enzyme's diiron cluster site. The N-terminus is important, through coordination of a set of loops covering the active site, in shielding the active site during catalysis. Role of residue K127 in governing the access o the diiron cluster 687712 1.13.99.1 sitting drop vapour diffusion method producing crystals from unbuffered 4.4 M sodium formate 671152