Figure 1: Example of raw 2D PTM distributions around acetylation sites. Frequencies on the Y-axis, number of amino acids away from the centralised PTM category on the X-axis. A clear peak can be seen in the frequencies of other PTMs in the near vicinity of acetylation sites (blue–all phosphorylation; red–phosphoserine; purple–phosphotyrosine; lilac–acetyllysine; green– deamidated asparagine).