KEGG Orthology (KO) [BR:cml00001] 09180 Brite Hierarchies 09183 Protein families: signaling and cellular processes 02000 Transporters [BR:cml02000] BN424_848 pbuX; xanthine permease family protein K16169 pbuX; xanthine permease Transporters [BR:cml02000] Other transporters Electrochemical potential-driven transporters [TC:2] BN424_848 pbuX; xanthine permease family protein K16169 pbuX; xanthine permease