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    • 4. 发明授权
    • D-amino acid oxidase from Trigonopsis variabilis immobilized on porous
copolymer beads
    • 固定在多孔共聚物珠上的来自不同变种的D-氨基酸氧化酶
    • US5599702A
    • 1997-02-04
    • US443017
    • 1995-05-17
    • Klaus Sauber
    • Klaus Sauber
    • C08F8/12C08F218/08C12N11/08C12N11/18C12P17/18C12P35/06C12R1/01C12N11/06C12P35/00
    • C12N11/18C12N11/08C12P35/06Y10S435/911
    • D-amino acid oxidase (DAO) in purified, partially purified or crude form is immobilized on a porous bead-shaped support that is a copolymer of vinyl acetate and/or vinyl alcohol and a crosslinking agent. A preferred crosslinking agent is N,N'-divinylethyleneurea. The amount of crosslinking agent is 1 to 60% by weight of the copolymer, and acyloxy groups of vinyl acetate may be present on the support as such or may have been hydrolyzed to hydroxyl groups. The support preferably has a mean particle size of 20 to 800 .mu.m and a mean pore diameter of 2 to 10,000 nm. The D-amino acid oxidase is preferably obtained from Trigonopsis variabilis and purified by ion exchange chromatography. The D-amino acid oxidase may be covalently bonded to a spacer such as epichlorohydrin or its homolog that is bound to the support. Catalase may also be immobilized.
    • 纯化,部分纯化或粗制的D-氨基酸氧化酶(DAO)固定在作为乙酸乙烯酯和/或乙烯醇和交联剂的共聚物的多孔珠状载体上。 优选的交联剂是N,N'-二乙烯基亚乙基脲。 交联剂的量为共聚物的1至60重量%,乙酸乙烯酯的酰氧基可以存在于载体上,或者可能已经水解成羟基。 该载体的平均粒径优选为20〜800μm,平均孔径为2〜10,000nm。 D-氨基酸氧化酶优选得自变形变种,并通过离子交换层析纯化。 D-氨基酸氧化酶可以共价结合到间隔基如表氯醇或其与载体结合的同系物。 过氧化氢酶也可以被固定化。