Dependent peptides with putative alk-3-HHD-derived modifications.

Dependent peptides containing HDMP-/HTO-type modifications were identified using S4 Script. All modifications were detected as sulfonyl derivatives, and all could be localised to lysine residues. DPs were matched to Salomón and coauthors’ search results [28] (‘+’ = match) by sequence, site of modification and modification type (‘Expected analyte’), or by protein site only (‘Expected site’). Two site numbers are given: the number used for the matching (first number); and the equivalent number for the mature protein (second number, in parentheses). (XLSX)