CYCT1, or Cyclin T1, is a human gene encoded by CCNT1. It may also be known as: Cyclin-T1; CycT1; Cyclin-T; CCNT; HIVE1. The encoded protein has an amino acid length of 726 and a mass of 80.7 kDa. Other isoforms may exist. CYCT1 is a member of the Cyclin family, Cyclin C subfamily. Homologs of this gene exist in other organisms, including: Mouse, Rat, Zebrafish, Frog, Chicken.