Figure 1
From: High-throughput peptide quantification using mTRAQ reagent triplex
Examples of overlapping triplex isotopic clusters. (a) Schematic model of overlapping triplex isotopic clusters. Blue, red, and green lines represent isotopic peaks of light-, medium-, and heavy-labeled peptides, respectively. (b) Experimental overlapping isotopic clusters of ‘EPMIGVNQELAYFYPELFR’. We can observe that the first isotopic peaks of medium- and heavy-labeled peptides are clearly higher than the corresponding third peaks, and it is evidence for the existence of overlaps.