1.11.1.23	crystal structures of holoenzyme and the complex with fosfomycin are determined and reveal a two-domain combination and Zn2+ in the active site	
1.11.1.23	hanging drop vapour diffusion method, six X-ray structures of this enzyme: the apoenzyme at 2.0 A resolution, a native Fe2+-bound form at 2.4 A resolution; a tris(hydroxymethyl)aminomethane-Co2+-enzyme complex structure at 1.8 A resolution, a substrate-Co2+-enzyme complex structure at 2.5 A resolution; and two substrate-Fe2+-enzyme complexes at 2.1 and 2.3 A resolution	
1.11.1.23	vapour diffusion method. The hexagonal form displays symmetry consistent with space group P6(1/5)22 and unit-cell parameters a = 86.44, c = 221.56 A, gamma = 120°