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英语翻译Human insulin is a relatively small protein that consist

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英语翻译
Human insulin is a relatively small protein that consists of 51 amino acids in two short polypeptide chains.(For amino acid abbreviations,see Appendix C.) Two bridges link the two chains.A third
bridge spans a section within the short chain.Known as disulfi de bridges,these links always involve the amino acid cysteine (Cys),whose side group contains sulfur (S).Cysteines connect to each other when bonds form between these side groups.
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英语翻译Human insulin is a relatively small protein that consist
人体胰岛素算是比较小得蛋白质.它有两条多肽链,其中包含了51个氨基酸.(氨基酸缩写请看注释C)这两条多肽链由于两处相连.第三条连接是短的一条多肽链的一部分.这第三条连接叫二硫键.这些连接都包含半胱氨酸这个氨基酸.半胱氨酸的侧基包含硫磺.半胱氨酸与其他的半胱氨酸通过它们的侧基相连.