DNA SynthesisdNDPsDNAdNTPsPolyamineSynthesisNDPsGuanineSperminePold1Uric acidAdslMthfd2RiboseIMPSpermidineHypoxanthineAdenylosuccinateHprt1Rrm2OrnithineRrm1Rrm2bRrm1Xanthine monophosphateGMPAMPPolbAdenineGMPSat1AdssAICARGMPDhfrImpdh1Prps1PRPPPolgNme2SAICAROaz1SrmPrps2PutrescinePola1