Fig. 4

Mitochondrial tricarboxylic acid cycle status of breast muscle. A Changes of TCA cycle related metabolites and enzyme activities; B Acetyl-CoA concentration in breast muscle; C Mitochondrial CA concentration in breast muscle; D Oxaloacetic acid concentration in breast muscle; E Activity of CS in breast muscle; F Activity of ICD in breast muscle; G Activity of SDH in breast muscle; H Activity of MDH in breast muscle. Results were expressed as box with mean values (n = 6). “ + ” in the box represents the mean value. P¹ was the t-test P-value between CON and HS group. P² was the ANOVA P-value among these HS groups. * means there was a significantly difference between CON and HS group (P < 0.05). Different letters indicate significant difference between each HS group (P < 0.05)