qRT-PCR was performed to profile gene expression in each complex of the electron transport chain after cowpea bruchids were exposed to hypoxia/hypercapnia for 24 hr. CmND: NADH dehydrogenase, CmND1: NADH dehydrogenase subunit 1, CmND2: NADH dehydrogenase subunit 2, CmND3: NADH dehydrogenase subunit 3, CmND4: NADH dehydrogenase subunit 4, CmNDU1α: mitochondrial NADH dehydrogenase (ubiquinone) 1 alpha subcomplex, CmNUO39: NADH-ubiquinone oxidoreductase 39 kda subunit, CmUCR: ubiquinol-cytochrome c reductase complex, CmUCRFS: ubiquinol-cytochrome c reductase iron-sulfur subunit, CmUCR9: ubiquinol-cytochrome c reductase subunit 9, CmUCRH: mitochondrial ubiquinol-cytochrome c reductase hinge protein, CmCOXI: cytochrome c oxidase subunit I, CmCOXII: cytochrome c oxidase subunit II, CmCOXIII: cytochrome c oxidase subunit III, CmCOX4: mitochondrial cytochrome c oxidase subunit 4, CmCOX5B-1: mitochondrial cytochrome c oxidase subunit 5B isoform 1, CmCOX7C: mitochondrial cytochrome c oxidase subunit 7C, CmCOX11: cytochrome c oxidase assembly protein cox11, CmOXA1: cytochrome c oxidase biogenesis protein OXA1.