期刊
ACTA CRYSTALLOGRAPHICA SECTION F-STRUCTURAL BIOLOGY COMMUNICATIONS
卷 65, 期 -, 页码 379-382出版社
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S1744309109008240
关键词
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The beta-lactamase Toho-1 exhibits a strong tendency to form merohedrally twinned crystals. Here, the crystal quality of Toho-1 was improved by using surface modification to remove a sulfate ion involved in crystal packing. The surface-modified Toho-1 variant (R274N/R276N) was crystallized under similar conditions to those used for wild-type Toho-1. R274N/R276N did not form merohedrally twinned crystals. The crystals diffracted to a significantly higher resolution (similar to 0.97 angstrom) than the wild-type crystals (1.65 angstrom); they belonged to the same space group and had almost identical unit-cell parameters to those of wildtype Toho-1.
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