 α-Dystrobrevin 2 primarily co-localizes with dystrophin at the neuromuscular junction, while α-Dystrobrevin 1 co-localizes with both dystrophin and utrophin.α-Dystrobrevin 3 has been thought to be located on the cytoplasmic site.The location and expression pattern of β-dystrobrevin was observed by using Northern blots of mouse RNAs.