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A simple and efficient approach for preparing cationic coating with tunable electroosmotic flow for capillary zone electrophoresis-mass spectrometry-based top-down proteomics
Analytica Chimica Acta ( IF 5.7 ) Pub Date : 2024-08-28 , DOI: 10.1016/j.aca.2024.343162
Qianjie Wang 1 , Guangyao Gao 2 , Fei Fang 2 , Qianyi Wang 2 , Peter K Lundquist 3 , Liangliang Sun 2
Affiliation  

Capillary zone electrophoresis-tandem mass spectrometry (CZE-MS/MS) has become a valuable analytical technique in top-down proteomics (TDP). CZE-MS/MS-based TDP typically employs separation capillaries with neutral coatings (i.e., linear polyacrylamide, LPA). However, issues related to separation resolution and reproducibility remain with the LPA-coated capillaries due to the unavoidable non-specific protein adsorption onto the capillary wall. Cationic coatings can be critical alternatives to LPA coating for CZE-MS/MS-based TDP due to the electrostatic repulsion between the positively charged capillary inner wall and proteoform molecules in the acidic separation buffer. Unfortunately, there are only very few studies using cationic coating-based CZE-MS/MS for TDP studies.

中文翻译:


一种简单高效的方法,用于基于毛细管区电泳-质谱的蛋白质组学中具有可调谐电渗流的阳离子涂层



毛细管区间电泳-串联质谱 (CZE-MS/MS) 已成为自上而下蛋白质组学 (TDP) 中一种有价值的分析技术。基于 CZE-MS/MS 的 TDP 通常采用带有中性涂层(即线性聚丙烯酰胺,LPA)的分离毛细管。然而,由于 LPA 包被的毛细管不可避免地会吸附到毛细管壁上,因此与分离分离分辨率和重现性相关的问题仍然存在。阳离子涂层可能是基于 CZE-MS/MS 的 TDP 的 LPA 涂层的关键替代品,因为在酸性分离缓冲液中,带正电的毛细管内壁和蛋白型分子之间存在静电排斥。遗憾的是,使用基于阳离子涂层的 CZE-MS/MS 进行 TDP 研究的研究非常少。
更新日期:2024-08-28
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