 Dystrobrevin protein is a part of the cytoplasmic complex and an intracellular protein that binds directly to dystrophin.In invertebrates, dystrobrevin is present as a single protein, while in vertebrates, there are two isoforms, a-dystrobrevin (DTNA) and β-dystrobrevin (DTNB).Each dystrobrevin isoform has a unique structure with carboxyl termini and sequence homology with the cysteine-rich carboxyl-terminal region of dystrophin.