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. 2016 Mar 14;113(13):E1806–E1815. doi: 10.1073/pnas.1523575113

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Fig. S4. — HPLC–ESI–MS data of the peptide carrying the sulfohistidine. (A) MS¹ data of the modified peptide possessing a neutral loss of 80 Da in MS² spectra. The mass precision of the performed measurements is better than 3 ppm. The MS¹ masses match to a sulfonation of the modified peptide, whereas a putative phosphorylation can be excluded. (B) Exemplary MS² spectrum of 595.93 m/z (MS¹) displaying a neutral loss of 80 Da. (C) MS³ spectrum of 569.6 m/z (MS2) originating from 595.93 m/z (MS¹). (D) List of matched peptide fragments.

Fig. S4. — HPLC–ESI–MS data of the peptide carrying the sulfohistidine. (A) MS¹ data of the modified peptide possessing a neutral loss of 80 Da in MS² spectra. The mass precision of the performed measurements is better than 3 ppm. The MS¹ masses match to a sulfonation of the modified peptide, whereas a putative phosphorylation can be excluded. (B) Exemplary MS² spectrum of 595.93 m/z (MS¹) displaying a neutral loss of 80 Da. (C) MS³ spectrum of 569.6 m/z (MS2) originating from 595.93 m/z (MS¹). (D) List of matched peptide fragments.