评估C18静态相具有正电荷表面的蛋白质LC-MS应用程序使用移动相与减少的甲酸度酸化的移动相
Siddharth Jadeja1, Aleksandr A Karsakov1, Hana Sklenářová1
1Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203/8, 500 03 Hradec Králové, Czech Republic.
Journal of chromatography. A
|July 13, 2024
概括
带正电荷的C18柱增强分离和质谱 (MS) 灵敏度,使用低度的酸. 在Acquity Premier CSH C18列显示卓越的性能,增强MS信号和蛋白质组分析中的标识.
科学领域:
- 分析化学 分析化学
- 蛋白质组学是指蛋白质组学.
- 染色体学 染色体学 是一种染色学.
背景情况:
- 传统的C18静止阶段通常需要高度的酸来分离,这可以抑制MS的敏感性.
- 带正电荷的C18 (PCS-C18) 静态相有可能改善分离和MS敏感度,同时降低移动相酸度.
研究的目的:
- 评估不同PCS-C18列化学物质对分离性能和MS敏感性的影响,使用低度的甲状酸 (0.01%).
- 为了评估PCS-C18柱的表面电荷相互作用和负载能力.
- 确定最佳的PCS-C18列,用于增强蛋白质样本中的类鉴定.
主要方法:
- 三个PCS-C18列被测试,其中一个移动阶段含有0.01%的酸.
- 酸盐保留被用来评估表面电荷相互作用.
- 分离性能和负载能力分别使用特征良好的和基本进行评估.
- 使用trastuzumab和细菌细胞溶解酸的三性消化物评估了类鉴定改进.
主要成果:
- 在AdvanceBio Peptide Plus列表中,表现出最高的表面电荷相互作用.
- 在Acquity Premier CSH C18柱体表现出良好的峰值形状和高负载能力,即使有0.01%的酸.
- 所有测试的列都显示了MS信号强度的改善和减少酸的类鉴定.
- 在Acquity Premier CSH C18列中,MS信号强度增加了65%,并从细菌样本中发现了19%的.
结论:
- 将静态相化学调整为移动相组合,可以显著提高蛋白质分子输出,而无需额外的成本.
- PCS-C18静止相,特别是Acquity Premier CSH C18,适用于低离子强度的移动相,改善基于LC-MS的鉴定.
- 了解低甲酸PCS-C18阶段的保留机制对于选择LC-MS蛋白质应用的最佳列至关重要.
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