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. Author manuscript; available in PMC: 2022 Apr 2.
Published in final edited form as: J Proteome Res. 2022 Mar 15;21(4):1189–1195. doi: 10.1021/acs.jproteome.1c00771

Figure 1.

Figure 1.

Representation of the same N-terminal segment (sharing the same amino acid sequence) of two hypothetical proteoforms using ProForma 2.0: the unmodified proteoform (top part of the figure) and one containing different protein modifications (lower part of the figure). The text coloration is only included here to improve clarity. The purple tag encodes the existence of an unlocalized phosphorylation event somewhere on the proteoform. The keyword “Phospho” is from Unimod and can be used without additional clarification. The brown tag is a reference to an N-terminal modification using the term ”Acetyl” from Unimod. A 174.3 Da mass shift on the arginine is also indicated.