The present invention describes isotopic and isobaric labelling reagents suitable for double labelling different individual protein samples. After double labelling of the individual protein samples, the labelled polypeptides in an individual sample have a unique combination of an isotopic and an isobaric label. Thereafter all samples are pooled. Peptides from the pooled samples are isolated and analysed by mass spectrometry for determining the relative concentration of each differentially labelled polypeptide
本发明描述了适用于对不同蛋白质样品进行双重标记的同位素和等位
基因标记试剂。在对单个蛋白质样品进行双重标记后,单个样品中被标记的
多肽具有独特的同位素和等位
基因标记组合。之后,所有样本被集中起来。从汇集的样品中分离出
多肽,并用质谱仪进行分析,以确定每种不同标记
多肽的相对浓度。