article 10 nucleoside 10 NUCLEOSIDES AND NUCLEOTIDES/metabolism 8 Nucleosides 8 Nucleotides 8 metabolism 8 nucleotide 8 glycoside 6 GLYCOSIDES/metabolism 4 Glycosides 4 catalysis 4 glycosylation 4 nonhuman 4 nucleotide metabolism 4 2 deoxyribose 2 2,6 diaminopurine 2',3' dideoxyriboside 2 Antitumoral agents 2 Antiviral agents 2 Azanucleosides 2 Bacteria (microorganisms) 2 Biocatalysts 2 Cell immobilisation 2 Citrobacter 2 Citrobacter amalonaticus 2 Concentration (process) 2 Coupled enzymatic systems 2 DNA synthesis 2 Diphosphates 2 ENZYMES/metabolism 2 Enzymes 2