 Slight differences in the size of the β-dystrobrevin were observed in the brain compared with the kidney, liver, and lung.α-Dystrobrevin 1 is localized in the sarcolemma and is abundant at the neuromuscular junction, and concentrated in the crest of the junctional folds.α-Dystrobrevin 2 is localized around the entire circumference of the sarcolemmal plasma membrane including the neuromuscular junction.