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The cephalosporin acylases are a group of enzymes that hydrolyze cephalosporin C and/or glutaryl 7-aminocephalosporanic acid to produce ?-aminocephalosporanic acid. The cephalosporin acylase from Pseudomonas sp. strain 130 was crystallized in two different forms suitable for structural studies. A tetragonal crystal form diffracted to 0.24 nm belonged to the space group P41212. There was one αβ heterodimer per asymmetric unit. A second crystal form diffracted to 0.21nm belonged to the space group P21. There was four αβ heterodimers per asymmetric unit. The tetragonal crystal structure of CA-130 was determined using the multiwavelength anomalous diffraction method and the P21 crystal structure was then determined using the molecular replacement method. 相似文献
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品牌作为全球化竞争中国家、地区和城市综合竞争力的标志,品牌信息资源无疑是最为重要的生产要素、无形资产,国家、地区和城市的战略性资源、主要财富体现。《2006—2020国家信息化发展战略》指出,"信息化与经济全球化相互交织,推动着全球产业分工深化和经济结构调整,重塑着全球经济竞争格局"。 相似文献
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