1.3.7.11 | wild-type and mutant enzymes, in apoform or complexed with geranygeranyl diphosphate, sitting drop vapor diffusion, mixing of 10 mg/ml protein in 25 mM HEPES, pH 7.4, with well solution containing 0.1M Tris, pH 7.5, 10% PEG 3350, and 0.2 M L-proline, in a 1:1 ratio, sparse matrix-screening crystallization method for method screening, addition of 5 mM GGPP for ligand-bound crystals, 2 days, X-ray diffractin structure determination and analysis, modeling |