<p>This entry recognises specifically the D subunit of NADH dehydrogenase I complex. It excludes the related chain of NAD(P)H-quinone oxidoreductases from chloroplast and Synechocystis, where the quinone may be plastoquinone rather than ubiquinone. This subunit often appears as a subunit C/D fusion.</p> NADH dehydrogenase I, subunit D