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. 2021 Apr 7;2021:baab012. doi: 10.1093/database/baab012

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Figure 2. — Schematic PTM discovery timeline for 10 major PTMs: phosphorylation (28), methylation (29), sulfation (30), acetylation (31), ubiquitylation (32), prenylation (33), myristoylation (34), SUMOylation (35), palmitoylation (36), different types of glycosylation (N-glycosylation (37), O-glycosylation (38), C-glycosylation (39) and S-glycosylation (40)), phosphoglycosylation (41) and glycosylphosphatidylinositol (GPI anchored) (42). For each PTM, target residue(s) and the organism in which the related PTM was discovered for the first time are shown.