In biochemistry, a kinase is an enzyme that catalyzes the transfer of phosphate groups from high-energy, phosphate-donating molecules (ATP) to specific substrates. This process is known as phosphorylation. The protein kinases make up the majority of all kinases and are widely studied. A protein kinase modifies other molecules, mostly proteins, by phosphorylation to regulate the majority of cellular pathways, especially those involved in signal transduction. Various other kinases act on small molecules such as lipids, carbohydrates, amino acids, and nucleotides, either for signaling or to prime them for metabolic pathways.

TargetMol’s Kinase Inhibitor Library, containing 2840 kinase inhibitors/regulators , can be used for research in chemical genomics, pharmacological study, and drug screening for related diseases.