>sp|A8G4Z1|ACSF_PROM2 Magnesium-protoporphyrin IX monomethyl ester [oxidative] cyclase OS=Prochlorococcus marinus GN=acsF MSKSTIEPKNKKSVNRGKEIAKDTILTPNFYTTDFEAMEKMDLSINEDELEAICEEFRKD YNRHHFVRNKEFEGAADKLDPETRELFVDFLEGSCTSEFSGFLLYKELSKRIKDKNPLLA ECFAHMARDEARHAGFLNKSMNDFGLQLDLGFLTANKDYTYFPPRSIFYATYISEKIGYW RYIAIFRHLEKNPEGKIFPLFNFFENWCQDENRHGDFFDALMKAQPRSVKSLSNKITIGG STFTHPLFDYFHRFRYFLNNHPFVSKLWSRFFLLAVFATMYIRDQGTKKDFYSALGLDAR EYDQFVINKTNETSARVFPVVLNVFDDSFYRRLDSIVENGKRLSEIDKKDNQNLNKVLSK IPIFISNGYQLLRLYLLKPLDSKDYQPSIR