液相色谱-质谱(LC-MS)联用是当今规模化蛋白质鉴定的主流技术.肽段在反相液相色谱(RPLC)中的保留时间主要是由肽段的理化性质和LC条件(固定相、流动相)决定的.可以通过分析肽段的理化性质,并量化它们对肽段色谱行为的影响来预测保留时间.预测结果可以用于帮助提高蛋白质鉴定的数量和可信度,也可用于肽段的翻译后修饰等研究.现在已有的保留时间预测算法主要有保留系数法和机器学习法两大类,得到的预测保留时间与实际保留时间相关系数可达到0.93.随着色谱和质谱技术的不断发展,肽段色谱行为的稳定性和重现性越来越好,保留时间预测结果也越来越准确.预测肽段保留时间将成为提高蛋白质鉴定结果的重要技术手段之一.
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