3-sulfanylpropanoyl (N-term and Lys) thioacylation of primary amines - site K 216.0932464599609375 216.3000030517578125 3,3-Dithio-bis-(sulfosuccinimidyl)propionate 87.99828338623046875 88.12000274658203125 C 3 H 4 O 1 S 1 C 9 H 16 N 2 O 2 S 1 K MOD:01224 PSI-MOD Thioacyl This Unimod entry is misdescribed as "thioacylation" [JSG]. Unimod:126 artifact modification from Unimod Other - thioacetylk thioacylation of primary amines (N-term and Lys)