borderline significantP = 0.0571
Deamidation was the next most abundant PTM and showed differences based on both age and solubility, with YWS versus OWS, OWS versus OWI, and YWI versus OWI comparisons all being significant ( P < 0.05) and the YWS versus YWI comparison being borderline significant ( P = 0.0571; see Fig. 2 B).