PLAC1 is a symbol for the gene, Placenta specific 1, in humans. Other names include: Placenta-specific protein 1; cancer/testis antigen 92; CT92; OOSP2L; placenta-specific 1. The encoded protein has an amino acid length of 212 and a mass of 23.6 kDa. Other isoforms may exist. PLAC1 is a member of the PLAC1 family. This gene shares homology with other species, including: Rat.