Fig. 1.

Proteomap of the budding yeast S. cerevisiae based on data from ref. 14. Every tile (small polygon) represents one type of protein. Tiles are arranged and colored according to the hierarchical KEGG pathway maps such that larger regions correspond to functional categories. The diagrams show three hierarchy levels (top three panels) and the level of individual proteins (Bottom). Tile sizes represent the mass fractions of proteins (protein abundances obtained by mass spectrometry, multiplied by protein chain lengths). Color code: blue, genetic information processing; brown, metabolism; red, cellular processes; green, signaling. Proteins—mostly low-abundance ones—that do not map to any category are shown in a gray area. The light-gray hexagon illustrates the area that covers 1% of the proteome.