Fig. 1From: Identification of proteins associated with development of psoriatic arthritis in peripheral blood mononuclear cells: a quantitative iTRAQ-based proteomics studyExperimental workflow for iTRAQ labeling proteome analysis. Equal amounts of proteins from 12 samples were digested with trypsin. The resultant peptides were subjected to iTRAQ labeling, HPRP fractionation, and subsequent LC–MS/MS analysisBack to article page