Carbon-Nitrogen LigasesUridine TriphosphateUracil NucleotidesAdenosine TriphosphatePyrimidine NucleotidesPurinergic AgonistsReceptors, Purinergic P2Y2Receptors, Purinergic P2Cytosine NucleotidesUridinePurinergic P2 Receptor AgonistsUridine PhosphorylaseNucleotidesReceptors, PurinergicUridine KinaseGuanosine TriphosphateCalciumAmino Acyl-tRNA SynthetasesGlutamate-Ammonia Ligase2',5'-Oligoadenylate SynthetaseCells, CulturedKineticsCytidine TriphosphateUridine MonophosphateThiamine TriphosphateUridine Diphosphate SugarsGuanosine 5'-O-(3-Thiotriphosphate)