Opo is an alias for the gene, Orofacial cleft 1 candidate 1, in humans. Other names include: Orofacial cleft 1 candidate gene 1 protein; Orofacial clefting chromosomal breakpoint region candidate 1 protein; MRDS1. The encoded protein has an amino acid length of 231 and a mass of 26.8 kDa. This gene shares homology with other species, including: Mouse, Rat, Zebrafish, Frog, Chicken.