Fig 2. The morphological distribution of mitochondria in the muscle of the yak during postmortem maturation with a confocal laser microscope.

The mitochondria are marked green by MitoTracker Green. A-F: at 0, 12, 24, 72, 120 and 168 h in the NAD⁺ treatment group; G-K: at 12, 24, 72, 120 and 168 h in the blank control group; L-P: at 12, 24, 72, 120 and 168 h in NADH treatment group.