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. 2016 Mar 7;27(2):61–74. doi: 10.7171/jbt.16-2702-002

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Figure 7. — MS/MS analysis and identification of the Nt tryptic peptide a dimethyl MAAVPQNNLQEQLER (A) and dimethyl AAVPQNNLQEQLER (B) in sample 710SP_A1. C) Representation of the 710SP_A1 experimental data that identified the fragment of BLM. All green residues have been confirmed with >95% probability by the Scaffold FDR algorithm. There are 2 tryptic peptides that identify the Nt-dimethylation: peptides spanning aa 1–15 and 2–15. BLM protein has 123 lysine residues. Experimental data map 27 lysines (out of 35 that are present in the proteolytic fragment of BLM); 15/27 lysines are found to be dimethylated (see mapped, green regions with Dimethyl K); and nearly all are internal (miscleaved) lysines.

Figure 7. — MS/MS analysis and identification of the Nt tryptic peptide a dimethyl MAAVPQNNLQEQLER (A) and dimethyl AAVPQNNLQEQLER (B) in sample 710SP_A1. C) Representation of the 710SP_A1 experimental data that identified the fragment of BLM. All green residues have been confirmed with >95% probability by the Scaffold FDR algorithm. There are 2 tryptic peptides that identify the Nt-dimethylation: peptides spanning aa 1–15 and 2–15. BLM protein has 123 lysine residues. Experimental data map 27 lysines (out of 35 that are present in the proteolytic fragment of BLM); 15/27 lysines are found to be dimethylated (see mapped, green regions with Dimethyl K); and nearly all are internal (miscleaved) lysines.