>sp|A8G3H7|UCRI_PROM2 Cytochrome b6-f complex iron-sulfur subunit OS=Prochlorococcus marinus GN=petC MTQLSSKDVPSMGRRQFMNLLTFGTATGVALGALYPVANYFMPLRAGGGGGGTSAKDELG NPITKTGWLATHQAGDRSLVQGLKGDPTYLIVNEGGGIGEFGLNAICTHLGCVVPWDSGA NKFICPCHGSQYDTNGKVVRGPAPLSLALAHVDIEDDAVLVKQWSETDFRTNENPWWA