Effects of the administration of AX on the content of PHB, ANT2, VDAC1, and VDAC2 in rat heart mitochondria in heart failure. Upper part—immunostaining with PHB, ANT2, VDAC1, VDAC2, and Tom20 antibodies; Low part—quantification of immunostaining by computer-assisted densitometry presented as a ratio of proteins to Tom20. Bar graphs represent the levels of appropriate proteins; the data are presented as the means ±SD of three independent experiments. * p < 0.05 significant difference in the protein level in comparison with the control (group 1). # p < 0.05 compared to RHM isolated from ISO-injected rats (group 3). The statistical significance of the differences between the pairs of mean values was evaluated using the Student-Newman-Keul test.