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. Author manuscript; available in PMC: 2019 Mar 2.
Published in final edited form as: J Proteome Res. 2018 Feb 14;17(3):1321–1325. doi: 10.1021/acs.jproteome.7b00851

Figure 1.

Figure 1

Proteoform notation introduction, rules, and examples. (A) Proteoforms are composed of specific amino acid sequences with modifications at known positions along the sequence. This work presents a standard proteoform notation for writing these sequences in a flexible, human-readable way. (B) Brief examples for the seven current rules for specifying proteoform sequences. (C) Examples and explanations of best practices for writing human-readable proteoform sequences.