PRA is an alias for the gene, S100 calcium binding protein A6, in humans. Other names include: Protein S100-A6; Growth factor-inducible protein 2A9; MLN 4; Prolactin receptor-associated protein; S100 calcium-binding protein A6; Calcyclin; 2A9; 5B10; CACY. The encoded protein has an amino acid length of 90 and a mass of 10.2 kDa. PRA is a member of the S-100 family. This gene shares homology with other species, including: Mouse.