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Schematic structure of pig mtDNA (A), GR binding (B), and DNA (hydroxyl)methylation status of CpG island on the control region of mtDNA (C). Values are mean ± SEM, n = 6/breed. ** means p < 0.01 between breeds; GREs, glucocorticoid response elements; HSP, heavy strand promoter; LSP, light strand promoter.
