Fig. 3From: A graph-based approach for proteoform identification and quantification using top-down homogeneous multiplexed tandem mass spectraThe sizes of graphs used in HomMTM spectral interpretation. The numbers of vertices and edges in the graph generated from the histone H4 protein and five PTMs (acetylation, methylation, dimethylation, trimethylation, phosphorylation) increase significantly when the bound for the sum of mass shifts introduced by PTMs increases from 50 Da to 600 DaBack to article page