HS9 is an alias for the gene, Cleft lip and palate associated transmembrane protein 1, in humans. Other names include: Cleft lip and palate transmembrane protein 1. The encoded protein has an amino acid length of 669 and a mass of 76.1 kDa. Other isoforms may exist. HS9 is a member of the CLPTM1 family. This gene shares homology with other species, including: Mouse, Rat, Zebrafish, Frog.