Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Chemistry and Pharmacology
Histidine ammonium-lyase from P. putida was expressed in Escherichia coli, purified to homogeneity, and crystallized by the vapour-diffusion method using polyethylene glycol 3350 as the precipitant. The crystals, which diffract to at least 2.5 Å resolution, exhibit the symmetry of space group P212121, with unit-cell parameters a = 89.7, b = 138.2 and c = 164.8 Å. The asymmetric unit contains a tetramer, and the crystals have a Vm value of 2.41 Å3 Da−1.
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