>sp|O58393|RIFK_PYRHO Riboflavin kinase OS=Pyrococcus horikoshii GN=ribK MKLKTLLLLIDLGKRGAIGGKITITLREISKELDVSPQTTLRWLEELEELGYIEKEESRR GTSVMITEKGIRLLEKLYEDISIALYSGVIVGEVISGIGEGAYYVRQYAPFIREYLGFDP YPGTLNVKVIFPKTIFDALCTSRPIIIPGFKKNGRTFGDVRAYRIKIDGIEGAIVIPSRT VHPPKIAEVIAPVNLRKTLNLQDGDKVRIKVL