BBS8, or Tetratricopeptide repeat domain 8, is a human gene encoded by TTC8. It may also be known as: Tetratricopeptide repeat protein 8; Bardet-Biedl syndrome 8 protein; TPR repeat protein 8; RP51. The encoded protein has an amino acid length of 541 and a mass of 61.5 kDa. Other isoforms may exist. Homologs of this gene exist in other organisms, including: Fly, Zebrafish, Frog.