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细菌液化α-淀粉酶产生的单分支庚糖的结构

Structures of singly branched heptaoses produced by bacterial liquefying alpha-amylase.

作者信息

Umeki K, Yamamoto T

出版信息

J Biochem. 1975 Nov;78(5):889-96. doi: 10.1093/oxfordjournals.jbchem.a130994.

DOI:10.1093/oxfordjournals.jbchem.a130994
PMID:1240101
Abstract
  1. A singly branched heptaose produced as a limit dextrin in the digest of beta-limit dextrin with liquefying alpha-amylase [EC 3.2.1.1] of Bacillus amyloliquefaciens was isolated in a paper chromatographically pure state. 2. Analysis using several enzymes revealed that the isolated branched dextrin was a mixture of six singly branched heptaoses with different ramifying points. 3. All the branched heptaoses contained a 62-alpha-maltosylmaltotriose moiety in their molecules, differing only in the mode of attachment of one maltose or two glucose residues by alpha-1,4-glucosidic bonds from this core dextrin. 4. The formation of various singly branched heptaoses (the present paper) and hexaoses (the previous paper) is discussed regarding the attack site specificity of the enzyme on beta-limit dextrin.
摘要
  1. 从解淀粉芽孢杆菌的液化α-淀粉酶[EC 3.2.1.1]对β-极限糊精的消化产物中分离出一种单分支七糖,该七糖以纸色谱纯的状态得到。2. 使用几种酶进行分析表明,分离出的分支糊精是六种具有不同分支点的单分支七糖的混合物。3. 所有分支七糖分子中都含有一个62-α-麦芽基麦芽三糖部分,仅在一个麦芽糖或两个葡萄糖残基通过α-1,4-糖苷键与该核心糊精的连接方式上有所不同。4. 关于酶对β-极限糊精的攻击位点特异性,讨论了各种单分支七糖(本文)和己糖(前文)的形成。

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Structures of singly branched heptaoses produced by bacterial liquefying alpha-amylase.细菌液化α-淀粉酶产生的单分支庚糖的结构
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Structures of multi-branched dextrins produced by saccharifyiing alpha-amylase from starch.由淀粉糖化α-淀粉酶产生的多分支糊精的结构。
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