NADH:ubiquinone oxidoreductase subunit S4
AQDQ, CI-18
NADH dehydrogenase (ubiquinone) Fe-S protein 4 (18kD) (NADH-coenzyme Q reductase), "NADH dehydrogenase (ubiquinone) Fe-S protein 4, 18kDa (NADH-coenzyme Q reductase)"
complex I 18kDa subunit