RibonucleosidesPurinesGuanosinePurine NucleosidesRibonucleoside Diphosphate ReductaseDeoxyribonucleosidesNucleosidesUridineInosineRibonucleotidesIsopentenyladenosineCytidinePurine-Nucleoside PhosphorylasePurine NucleotidesOligoribonucleotidesRiboseAdenosineRNARibonucleotide ReductasesAminoimidazole CarboxamideKineticsDeoxyribonucleotidesMethylthioinosineCytosine NucleotidesCytidine DiphosphateUracil NucleotidesPyrimidine NucleotidesEquilibrative Nucleoside Transporter 1Escherichia coliNucleotidesDNA-Directed RNA PolymerasesThionucleosidesRNA NucleotidyltransferasesAdenineAcetabulariaRibosome SubunitsUridine KinaseHypoxanthineHypoxanthinesAMP-Activated Protein KinasesCytidine TriphosphateAdenosine Triphosphate