Fig. 4From: Vitamin A regulates mitochondrial biogenesis and function through p38 MAPK-PGC-1α signaling pathway and alters the muscle fiber composition of sheepRetinoic acid affected mitochondrial biogenesis and altered myofiber type composition through PGC-1α signaling. A Relative mRNA content of PGC-1α. B Relative mRNA content of MyHC I, MyHC IIa, MyHC IIb and MyHC IIx. C Protein expression of MyHC I and MyHC IIx. D Relative mRNA content of TFAM and NRF1. E mtDNA content. F Representative images showing the number of mitochondria in primary myoblasts. Data were shown as mean ± SEM; n = 3 in each group, 3 replications were used during the experiment and each well was considered as an experiment unit from different lambs, **P < 0.01. a–cValues with different letters indicated significant differences (P < 0.05)Back to article page