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. 2014 Jun 4;13(8):1993–2003. doi: 10.1074/mcp.M113.036087

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© 2014 by The American Society for Biochemistry and Molecular Biology, Inc.

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Fig. 2. — Depth and validation of the detected phosphoproteome. A, analysis of regulated phosphopeptides in Motif-X (24, 25) revealed two overrepresented motifs around phosphoserine. B, regulation of phosphosites in MuSK and AChR. Quantification of phosphopeptides on these proteins showed regulation of MuSK Y553 (red), AChR β Y390 (green) and AChR δ Y393 (orange). Furthermore, phosphorylation of MuSK S678; AChR β S378 and T387; and AChR δ S381, S382, and S383 was detected but not significantly regulated (all gray). Phosphosites of regulated peptides could be localized with high confidence (phosphoRS site probabilities are indicated in brackets). Error bars, S.D.