2.7.1.4 crystal structure of a FRK homolog from Halothermothrix orenii refined to 2.8 A resolution is reported. The structure of the Hore_18220 protein reveals a catalytic domain with a Rossmann-like fold and a beta-sheet lid for dimerization 2.7.1.4 Crystals of Vibrio cholerae Vc-FK and its cocrystal with fructose, ADP and Mg2+ are grown in the presence of polyethylene glycol 6000 and diffracted to 2.45 and 1.75 A resolution, respectively 2.7.1.4 hanging drop vapor diffusion method 2.7.1.4 the crystal structures of ROK FK from Bacillus subtilis (a) apo and in the presence of (b) ADP and (c) ADP/D-fructose is shown. All structures show that YdhR is a homo-dimer with a monomer composed of two similar alpha/beta domains forming a large cleft between domains that bind ADP and D-fructose