A unique acid phosphatase location: the transverse tubule of avian fast muscle.
Acid phosphatase activity was localized cytochemically in the posterior latissimus dorsi muscle of the chicken. Reaction product was observed in three distinct structures: T-tubules, sarcoplasmic reticulum and dense bodies. Examination of cross- and longitudinal sections confirmed that the reaction product was membrane-limited. Acid phosphatase activity was observed in sarcoplasmic reticulum adjacent to the A-I junction and the A-band, in termyofibrillar dense bodies located along the length of the fibre and in the T-tubules but not in the surface caveolae or in the lateral sacs of the sarcoplasmic reticulum. The uniqueness of the T-tubular localization with respect to cytochemical localizations in other muscles is discussed.
D000135:Acid Phosphatase / Q000032:analysis*; D000818:Animals; D002645:Chickens; D006651:Histocytochemistry; D008854:Microscopy, Electron; D009132:Muscles / Q000201:enzymology* / Q000648:ultrastructure; D012519:Sarcoplasmic Reticulum / Q000201:enzymology / Q000648:ultrastructure
D000135:Acid Phosphatase