>sp|Q7VDC0|UCRI_PROMA Cytochrome b6-f complex iron-sulfur subunit OS=Prochlorococcus marinus GN=petC MTQMSPSDVPSMGRRQFMNLLTFGTATGVALGALYPVANFFMPLRAGGGTGGTTAKDELG NAVTATGWLSNHPAGDRSLVQGLKGDPTYLIVDGDAAIGNFGINAICTHLGCVVPWNSGA NKYICPCHGSQYDANGKVVRGPAPLSLALTHIDIDDDNVLVSQWTETDFRTGDKPWWA