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The dual-domain β-propeller phytases (PhyHT) from Bacillus sp. HJB17, which had the secreted signal peptide of the first 40 amino acids deleted and had a typical BPP domain (PhyH-DII; residues 319–644) at the C-terminus and an incomplete N-terminal BPP domain (PhyH-DI; residues 41–318) that was found to act synergistically (with a 1.2–2.5-fold increase in phosphate release) with PhyH-DII, other BPPs (PhyP and 168PhyA) and a histidine acid phosphatase, was prepared, purified, crystallized and preliminary crystallographic analysis was undertaken. The structure of PhyHT will be therefore studied with the aim of explaining these functions.

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Recombinant XynAS9, a thermophilic GH10 xylanase from Streptomyces sp. S9, was crystallized and X-ray diffraction data were collected to 2.08 Å resolution.
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