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Shotgun proteomics using the iTRAQ isobaric tags Aggarwal K; Choe LH; Lee KHBrief Funct Genomic Proteomic 2006[Jun]; 5 (2): 112-20Shotgun proteomic methods involving isobaric tagging of peptides enable high-throughput proteomic analysis. iTRAQ reagents allow simultaneous identification and quantitation of proteins in four different samples using tandem mass spectrometry (MS). In this article, we provide a brief description of proteome analysis using iTRAQ reagents and review the current applications of these reagents in proteomic studies. We also compare different aspects of protein identification including protein sequence coverage and proteome coverage obtained using iTRAQ reagents with those using other shotgun proteomic techniques. We briefly discuss the issue of isotope purity correction in measured peak areas during protein quantitation using iTRAQ reagents. Finally, we conclude with some of the current challenges in MS-based proteomic analysis that are limiting protein identifications obtained by different shotgun proteomic methods.|Animals[MESH]|Humans[MESH]|Mass Spectrometry[MESH]|Proteome/*analysis[MESH]|Proteomics/*methods[MESH] |
