>sp|B4S3W8|RISB_PROA2 6,7-dimethyl-8-ribityllumazine synthase OS=Prosthecochloris aestuarii GN=ribH MTIKTIEGTLDARNSRFALVVSRFNDFIGQKLVEGAVDCIVRHGGSEEQIALYKCPGAFE LPSVAKKVAVSGRYDAVITLGAIIRGATSHYDVIAAEATKGVAQVGLDTMIPVTFGVLTT DNLEQAIERAGTKAGNKGFDAALAAIEMVNLYQQV