Longitudinal sections of adult rat EDL were immunolabeled with specific antibodies against CSQ and Trisk 49 (T49) (panels a, b, c), RyR and Trisk 32 (T32) (panels d, e, f) or Trisk 49 and Trisk 32 (panels g, h, i). Trisk 49 labeling (panel b) is presented as a double row of rods, closer to the Z-line than the triads are (represented by CSQ labeling, panel a). Trisk 32 labeling (panel e) appears as a row of dots in the middle of the triad double rows.