>sp|Q2JL39|UCRI_SYNJB Cytochrome b6-f complex iron-sulfur subunit OS=Synechococcus sp. GN=petC MTEAVSNFEAPPMSRRVLLNALLSGSVGVVVVGALYPVVKYFIPPSAGGGGEGLIAQDAL GKPISVSELLATHAATDRVLAQGLKGDPTYIVIDNGAVANYGLNAVCTHLGCVVPWNVGE NLFKCPCHGSQYAANGKVIRGPAPRSLELVSATVDGDNVRFSPWQGPDFRET