PLAC9 encodes the human gene, Placenta specific 9. It may also be known as: Placenta-specific protein 9; placenta-specific 9. The encoded protein has an amino acid length of 97 and a mass of 10.3 kDa. PLAC9 is a member of the PLAC9 family. Homologs of this gene exist in other organisms, including: Mouse, Rat, Frog, Chicken.