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Table 1 Five expected PTMs are allowed in the identification and quantification of histone H4 proteoforms

From: A graph-based approach for proteoform identification and quantification using top-down homogeneous multiplexed tandem mass spectra

PTM

Monoisotopic mass (Da)

Amino acids

Acetylation

42.01056

R, K

Methylation

14.01565

R, K

Dimethylation

28.03130

R, K

Trimethylation

42.04695

R

Phosphorylation

79.96633

S, T, Y