Effects of DHA on the expression of mitochondrial respiratory chain-associated proteins in LPS-induced HL-1 cells. A-D) Representative Western blot images showing the effect of DHA on the expressions of NDUFA9, SDHB, UQCRC2, and COX IV. Quantitative analysis of above proteins among all groups n = 3 independent experiments. **P < 0.01, compared with the control group; #P<0.05, ##P<0.01, compared with the LPS group.