Human PAK2 kinase (UniProt: Q13177; NCBI: NM_002577) belongs to a family of p21-activated kinases. These serine/threonine kinases are regulated by the small GTP binding proteins Cdc42 and Rac and have been implicated in a wide range of biological activities. PAK2 is activated by proteolytic cleavage during caspase-mediated apoptosis, and may play a role in regulating the apoptotic events in the dying cell. The calculated mass is 33,510. PAK2KD is fully phosphorylated at T402 and partially phosphorylated at additional sites with measured mass of 33,593 (1P), 33,673 (2P), 33,753 (3P), and 33,834 (4P).