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化学进展  2011 

电子捕获解离技术在生物质谱中的作用

, PP. 1710-1718

Keywords: 电子捕获解离,解离机理,生物质谱

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Abstract:

电子捕获解离(ECD)是一种非各态历经的(non-ergodic)解离方式,可导致多肽中N-Cα键断裂,也能更优先断裂S-S键,在较高电子能量条件下还可以区分亮氨酸和异亮氨酸,并且在断裂过程中能完整保留蛋白质分子的修饰位点。因此,它与碰撞活化解离(CAD)等传统解离方式形成了较为理想的互补。ECD与CAD的联合使用可提供更广泛的多肽覆盖率序列信息,提高蛋白测序的效率与准确度。本文在介绍ECD基本原理、解离机理的基础上,简要地总结了ECD技术在生物质谱中的作用。

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