COXFA4L2 and clear cell renal carcinoma: NADH dehydrogenase [ubiquinone] 1 alpha subcomplex, 4-like 2 (NDUFA4L2), is a subunit of Complex I of the mitochondrial respiratory chain, which is highly expressed in clear-cell renal carcinoma and involved in the transfer of electrons from NADH to ubiquinone and in the regulation of autophagic turnover of damaged mitochondria [15].