Mitochondria ultrastructural changes in 7 dpf dldh?/? larvae fast-twitch skeletal muscle fibers. (A and B) Mitochondrial ultrastructure was grossly disrupted in 7 dpf dldh?/? fibers, as compared with WT. Scale bars: 500 nm. (C) Percentage of damaged mitochondria in WT and dldh?/? fibers. (D?F) Mitochondrial ultrastructure morphological features of roundness, circularity, and solidity were quantitatively analyzed using ImageJ. (G and H) Mitochondria number relative to fiber cross-sectional area (?m?2) and average mitochondrial area per fiber cross-sectional area were analyzed using imageJ. In total, 110 (WT) and 102 (dldh?/?) in 24 (WT) and 15 (dldh?/?) fast-twitch muscle fibers from 3 WT and 3 dldh?/? larvae were analyzed. ****P < 0.0001, *P < 0.05 by unpaired Student?s t test. Data are shown as mean ± SD.
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