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Muscle biopsy immunostained for A, α-sarcoglycan; B, β-sarcoglycan; C, γ-sarcoglycan; and D, δ-sarcoglycan demonstrating diminished staining for all four in a woman with limb-girdle muscular dystrophy type 2D, α-sarcoglycanopathy. Courtesy of Charles S. Specht, MD.
