2.6.1.45 | enzyme in apoform and complexed with L-serine, large, greenish-yellow crystals grow from drops containing equal volumes of 11 mg/ml protein in 0.2 mM PLP, 10% glycerol, and 100 mM Tris-HCl, pH 8.5, and precipitant solution containing 4.1-4.2 M sodium formate, equilibration against the same precipitant, several days, at room temperature, X-ray diffraction structure determination and analysis at 2.2 A and 2.1 A resolution, respectively, modelling |