Figure 3.
NADH-tetrazolium reductase (NADH-TR) staining of flexor digitorum brevis muscle sections from K+-depleted rats treated for 10 days with 5.6 mg kg−1 day−1 of (a) acetazolamide and (b) dichlorphenamide. Tubular aggregates were observed in the type II fibres of muscles from K+-depleted rats, as demonstrated by the characteristic multifocal accumulation of materials in proximity of the sarcolemma stained by NADH-TR (magnification × 10).