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.