Fig. 3. Stability of the altered precursor proteins and endogenous peptides in TGF-β1-treated cells.

a Number of the precursor proteins based on their stability (short-lived vs. non-short-lived proteins). b Grouping of the endogenous peptides according to their three main categories of proteolysis. c Peptide stability based on the stability of amino acids at P1′ site. d GO enrichment analysis of molecular function of the precursor proteins classified by their stability