>sp|Q820Q4|CYSG_NITEU Siroheme synthase OS=Nitrosomonas europaea GN=cysG MDYLPVFLNIKQRDCLVVGGGEIAVRKIRLLLRAHARIHVVSPAISEELSNLLLQSPVIT HTAESFRPDHLQDRALAIAATNDHEVNRAVSAAARKAGIPVNVVDNPDLCTFIMPSILDR SPIIVAVSSGGTSPILARLLRSRLEALIPSAYGRLAEYAARFRDKVRQRFIHQENRRFFW ERMLQGPFAEMVFAGRDQAAQDYLSEALENSTDQFPTGEVYLVGAGPGDPDLLTFRAMRL MQQADVVIYDRLVSPAILDMVRQDATRIYVGKVRNQHTLPQTSINELLVKLAQEGKHVLR LKGGDPFIFGRGGEEIETLSQHHIPFQVVPGITAASGVASYAGIPLTHRDHAQSCVFVTG HLKDNTIQLDWPALARPNQTIVVYMGLLGVTELCRQLIAHGLQATTPAAIVQQGTTPNQR VLTGTLETLPDIIQQNPLKPPTLIIVGNVVKLHQKLAWFNSTSEPMGTSSGPGYP