Figure 2
From: PDTD: a web-accessible protein database for drug target identification
Functional and biochemical classifications of PDTD protein entries. (A) Database redundancy. Each bar represents the number of targets that have the same amounts of copies in the PDTD. Break is applied to the y axes. (B) Distribution of drug targets according to their therapeutic areas. (C) Distribution of drug targets according to their biochemical criteria, which include enzymes, receptors, ion channels, transporters, nuclear receptors, binding protein, structural proteins, signaling protein, and factors, regulators and hormones.