Tags: Protein.
Calpain-9 is a protein that in humans is encoded by the CAPN9 gene.Calpains are ubiquitous well-conserved family of calcium-dependent cysteine proteases. The calpain proteins are heterodimers consisting of an invariant small subunit and variable large subunits. The large subunit possesses a cysteine protease domain and both subunits possess calcium-binding domains.