1  Cover

      2  Preface

      3  Part I: General Aspects of Nucleotide Metabolism 1 Structures of Nucleotide-Related Compounds 1.1 Introduction 1.2 Nomenclature and Abbreviations of Nucleotide-Related Compounds 1.3 Chemical Structures of Nucleotide-Related Compounds 1.4 Summary References 2 Occurrence of Nucleotides and Related Metabolites in Plants 2.1 Purines and Pyrimidines 2.2 Pyridine Nucleotides 2.3 Concentration of Cytokinins 2.4 Alkaloids Derived from Nucleotides 2.5 Summary References 3 General Aspects of Nucleotide Biosynthesis and Interconversions 3.1 Introduction 3.2 De Novo Biosynthesis of Ribonucleoside Monophosphates 3.3 Interconversion of Nucleoside Monophosphates, Nucleoside Diphosphates, and Triphosphates 3.4 Conversion of Nucleoside Diphosphates to Nucleoside Triphosphates 3.5 Biosynthesis of Deoxyribonucleotides 3.6 Nucleic Acid Biosynthesis 3.7 Supply of 5-Phosphoribosyl-1-Pyrophosphate 3.8 Supply of Amino Acids for Nucleotide Biosynthesis 3.9 Nitrogen Metabolism and Amino Acid Biosynthesis in Plants 3.10 Summary References

      4  Part II: Purine Nucleotide Metabolism 4 Purine Nucleotide Biosynthesis De Novo 4.1 Introduction 4.2 Reactions and Enzymes 4.3 Summary References 5 Salvage Pathways of Purine Nucleotide Biosynthesis 5.1 Introduction 5.2 Characteristics of Purine Salvage in Plants 5.3 Properties of Purine Phosphoribosyltransferases 5.4 Properties of Nucleoside Kinases 5.5 Properties of Nucleoside Phosphotransferase 5.6 Role of Purine Salvage in Plants 5.7 Summary References 6 Interconversion of Purine Nucleotides 6.1 Introduction 6.2 Deamination Reactions 6.3 Dephosphorylation Reactions 6.4 Glycosidic Bond Cleavage Reactions 6.5 In Situ Metabolism of ¹⁴C-Labelled Purine Nucleotides 6.6 In Situ Metabolism of Purine Nucleosides and Bases 6.7 Summary References 7 Degradation of Purine Nucleotides 7.1 Introduction 7.2 (S)-Allantoin Biosynthesis from Xanthine 7.3 Catabolism of (S)-Allantoin 7.4 Purine Nucleotide Catabolism in Plants 7.5 Accumulation and Utilization of Ureides in Plants 7.6 Summary References

      5  Part III: Pyrimidine Nucleotide Metabolism 8 Pyrimidine Nucleotide Biosynthesis De Novo 8.1 Introduction 8.2 Reactions and Enzymes of the De Novo Biosynthesis 8.3 Control Mechanism of De Novo Pyrimidine Ribonucleotide Biosynthesis 8.4 Biosynthesis of Thymidine Nucleotide 8.5 Summary References 9 Salvage Pathways of Pyrimidine Nucleotide Biosynthesis 9.1 Introduction 9.2 Characteristics of Pyrimidine Salvage in Plants 9.3 Enzymes of Pyrimidine Salvage 9.4 Role of Pyrimidine Salvage in Plants 9.5 Summary References 10 Interconversion of Pyrimidine Nucleotides 10.1 Introduction 10.2