切换电离极性以简化数字聚合物的MS/MS测序:信息聚胺酸的案例
Isaure Sergent1, Ian Roszak2, Jean-François Lutz2
1Aix Marseille Université, CNRS, Institut de Chimie Radicalaire (ICR), Marseille, France.
Rapid communications in mass spectrometry : RCM
|February 1, 2026
概括
切换电离极性简化了多氨基二 (N-PPDE) 的MS/MS测序. 质子化N-PPDE产生简化数据,使长编码聚合物的可靠测序成为可能.
科学领域:
- 聚合物化学 聚合物化学
- 分析化学 分析化学
- 质谱测量质量谱测量
背景情况:
- 质谱/质谱 (MS/MS) 测序对于读取数字聚合物至关重要.
- 优化编码单元结构和电离极性是完整序列覆盖和防止信号稀释的关键.
- 研究了电离极性的影响MS/MS模式的多氨基基 (N-PPDE).
研究的目的:
- 探索电离极性的影响MS/MS碎片化模式的N-PPDE.
- 为了比较N-PPDE与其非氨基化对应物 (PPDE) 的MS/MS行为.
- 评估编码聚合物的简化和可靠测序的潜力.
主要方法:
- 合成的N-PPDE含有酸盐组和三级胺编码部分.
- 使用电子喷雾电离与酸产生既deprotonated和protonated物种.
- 在碰撞诱导解离 (CID) 下分析了N-PPDE在负离子和正离子模式中的MS/MS光谱.
主要成果:
- 脱的N-PPDE由于完全的酸盐键裂变而产生了八个碎片序列.
- 质子化N-PPDE仅产生了四个离子序列,与完整的OPO链接.
- 质子化N-PPDE的简化碎片化归因于靠近的酸盐组的质子溶解,有利于C-O键裂解.
结论:
- 与PPDE相比,切换到质子前体显著简化了N-PPDE的CID数据.
- 这种简化为扩展编码聚合物的精确MS/MS测序提供了有希望的途径.
- 这项研究强调了控制电离极性的实用性,以增强聚合物测序.
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