Key result
In rabbit, rat, and mouse ventricular heart muscle, the surface density and plasmalemmal area of diadic junctional complexes are 4- to 6-fold greater in the T-system than in the external envelope.
Authors
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Emphasizes T-tubules as primary dyad sites; leaves open functional roles in EC coupling and disease.
Page et al. (1979) studied Ventricular heart muscle morphology. Morphometric analysis of diadic junctional complexes was evaluated on Surface density and membrane area of diadic junctional complexes (DJC). In rabbit, rat, and mouse ventricular heart muscle, the surface density and plasmalemmal area of diadic junctional complexes are 4- to 6-fold greater in the T-system than in the external envelope.
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