>sp|Q8TVJ1|RIFK_METKA Riboflavin kinase OS=Methanopyrus kandleri GN=ribK MFTGPIVAVGEYVEGLGEGRRYVSIPYYRREIERVIGARPFPGTFNVRVEREERESLREL ASSYGYRIEPHGEYGGAWLYPCLVNGRPAWLVFPDLTEHRDQVELISETELRRELNVIHG DMVKIEVWGPSTWKLARRLTCGPSGGR