Cook W J, Koszalka G W, Hall W W, Burns C L, Ealick S E
J Biol Chem. 1987 Mar 15;262(8):3788-9.
Crystals of thymidine phosphorylase from Escherichia coli have been grown from solutions of ammonium sulfate. The crystals are tetragonal, space group P4(1)2(1)2 or P4(3)2(1)2; the axes are a = 132.0 (1) and c = 67.2 (1) A. The crystals are quite stable to x-rays and diffract beyond 2.6-A resolution. The molecule is a dimer and utilizes the 2-fold symmetry of the space group, resulting in one subunit per asymmetric unit.
来自大肠杆菌的胸苷磷酸化酶晶体已从硫酸铵溶液中生长出来。晶体为四方晶系，空间群为P4(1)2(1)2或P4(3)2(1)2；轴长为a = 132.0 (1) Å和c = 67.2 (1) Å。这些晶体对X射线相当稳定，衍射分辨率超过2.6 Å。该分子是一个二聚体，并利用空间群的二重对称性，导致每个不对称单元中有一个亚基。
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