>sp|A9BE84|UCRI_PROM4 Cytochrome b6-f complex iron-sulfur subunit OS=Prochlorococcus marinus GN=petC MTQMTPSDVPSMGRRQFMNLLTFGTATGVALGALYPVANYFMPLRAGGGGGGTSAKDELG NPITASGWLSNHPAGDRSLVQGLKGDPTYLIVEGSEAIGNFGINAICTHLGCVVPWNSGA NKYICPCHGSQYDANGKVVRGPAPLSLALAHIDVEDDKVFVSQWAETDFRTGEKPWWT