Fig. 3.

Bar chart depicting the assignment of all 357 peptides to COGs groups, denoted by capital letters (a ? indicates an uncertain assignment). The x-axis indicates the peptide count for each bar, whereas the number at the end of each bar indicates the percent of peptides assigned to that group. The functions represented by the four COGs groups that were most prevalent in the dataset are defined in the box. A full list of the functional categories represented by each COGs group letter is available at http://www.ncbi.nlm.nih.gov/COG/grace/fiew.cgi