... ⁄ m, acetylation and ⁄ or monomethy-lation; a ⁄ f, acetylation and ⁄ or formylation; 2m ⁄ f, dimethylation and ⁄ or formylation. The ‘a-’ in the second column (first PTM location) refersto N-terminal ... not contain a PTM. Symbols: a, acetylation; d, deamidation; f, formylation; m, methyl-ation; p, phosphorylation; u, ubiquitination; 2m, dimethylation; 2m ⁄ f, dimethylation and ⁄ or formylation; ... has no modifications at Lys26, and at posi-tion 27 there is an alanine, rather than a serine [43].Ubiquitination and formylation For the first time, ubiquitinations of the histone lin-ker protein...