 The second resulted in the separate dystrophin and utrophin genes.In addition, sequence alignments of dystrophin family protein strongly support the concept that two distinct subfamilies exist, one consisted of dystrophin, utrophin, and DRP2 and the other consisted of α- and β-dystrobrevin.Dystrobrevins are the product of two distinct genes coding for two highly homologous proteins, α- and β-dystrobrevin.