Figure 4

Enhancement of amino acid frequency in different parts of the enzyme structure. Amino acids that are found more often than average in different regions of an enzyme structure. Their labels are scaled to reflect their propensity for each compartment; the key in the bottom right-hand corner indicates how the label size relates to propensity. Hydrophobic aliphatic residues are shown in gray, aromatic amino acids in magenta, polar residues in green, negatively charged in red, positively charged in blue and cysteine in yellow.