C7orf24 is an alias for the gene, Gamma-glutamylcyclotransferase, in humans. Other names include: Cytochrome c-releasing factor 21; Gamma-glutamylcyclotransferase ; CRF21; GCTG; GGC. The encoded protein is an enzyme with an amino acid length of 188 and a mass of 21.0 kDa. C7orf24 is a member of the Gamma-glutamylcyclotransferase family. This gene shares homology with other species, including: Frog, Chicken.