Cyclin G Associated Kinase is a human gene encoded by the symbol, GAK. It may also be known as: Cyclin-G-associated kinase; Cyclin-G-associated kinase ; auxilin-2; DNAJ26; DNAJC26. The encoded protein is an enzyme with an amino acid length of 1311 and a mass of 143.2 kDa. Other isoforms may exist. Cyclin G Associated Kinase is a member of the Protein kinase superfamily, Ser/Thr protein kinase family. Homologs of this gene exist in other organisms, including: Mouse, Fly, Rat, Zebrafish, Frog, Chicken.