Correction: Comparative Analysis of Label-Free and 8-Plex iTRAQ Approach for Quantitative Tissue Proteomic Analysis.

Tables 1 and 5 are incorrectly aligned due to errors introduced in the production process. The publisher apologizes for the errors. Please see the corrected Tables 1 and 5 here.

Table 1

Overview of the number of peptides and the corresponding proteins as being identified in the individual MS-runs.

Method	Sample ID	# peptide groups	# protein groups
LFQ	3_pTa	5073	1096
	11_pTa	5269	1099
	16_pTa	5725	1185
	19_pTa	3931	937
	Mean (SD)_pTa	5000 ± 763	1079 ± 103
	9_pT2+	5360	1130
	12_pT2+	5112	1136
	15_pT2+	5516	1169
	17_pT2+	5485	1155
	Mean (SD)_pT2+	5368 ± 184	1148 ± 18
iTRAQ	10 μg	1859	664
	fractionation	6099	2064

Table 5

Comparison of the quantification results at the peptide and protein level for identifications with conflicting expression trends between fractionated iTRAQ and LFQ

Protein/ Peptide		Peptide Log2 Ratio (pT2+ vs. pTa)		Protein Log2 Ratio (pT2+ vs. pTa)
Protein Name	Peptide sequence used for quantification	iTRAQ + fractionation	LFQ	iTRAQ + fractionation	LFQ
Heterochromatin protein 1-binding protein 3	eASYSLIR	-0.24	0.03	-0,30	0.72
	mDAILTEAIk	-0,37	0.32
	tIPSWATLSASQLAR	-0.30	0.41
	SSAVDPEPQVK	-	1.31
	LEDVLPLAFTR	-	0.24
	GASGSFVVVQK	-	5.12
Actin-related protein 2/3 complex subunit 3	aYLQQLR	0.01	0.61	-0.25	0.37
	lIGNMALLPIR	-0.43	-0.06
	lIGNmALLPIR	-0.34	-
Dolichyl-diphosphooligosaccharide—protein glycosyltransferase subunit 2	sIVEEIEDLVAR	0,21	2.46	-0.06	1.23
	eDQVIQLMNAIFSk	-0.36	-
	fELDTSER	0.15	-
	nFESLSEAFSVASAAAVLSHNR	-0.12	-
	qEIQHLFR	0.09	-
	yHVPVVVVPEGSASDTHEQAILR	-0.38	0.62
	LQVTNVLSQPLTQATVK	-	0.33
	ISTEVGITNVDLSTVDKDQSIAPK	-	1.78
	NPILWNVADVVIK	-	3.65
	YIANTVELR	0.06	3.15
KH domain-containing, RNA-binding, signal transduction-associated protein 1	KDDEENYLDLFSHK	-	0.39	-0.25	0.63
	ILGPQGNTIK	-	0.55
	DSLDPSFTHAMQLLTAEIEK	-	2.42
	SGSMDPSGAHPSVR	0.06	0.68
	qPPLPHR	-0.56	-
General vesicular transport factor p115	SSQTSGTNEQSSAIVSAR	-	0.27	-0.10	0.52
	SQLNSQSVEITK	-	0.25
	NDGVLLLQALTR	-0,23	2.44
	eQDLQLEELR	-0.47	-
	qSEDLGSQFTEIFIk	0.31	-
	vASSTLLDDRR	-0.00007	-