NADH-plastoquinone oxidoreductase subunit I (<db_xref db="EC" dbkey="1.6.5.3"/>) catalyses the conversion of plastoquinone and NADH to plastoquinol and NAD(+). The enzyme binds two 4FE-4S clusters at iron-sulphur centres which are similar to those of the bacterial-type 4FE-4S ferredoxins. NADH-plastoquinone oxidoreductase, subunit I