Purine Nucleosides article 4 purine nucleoside 4 Acylase I 2 Amidohydrolases 2 Animal 2 Anura 2 Aspergillus 2 Aspergillus melleus 2 Bacillus stearothermophiles 2 Bacillus stearothermophilus 2 Bacteria 2 Base Sequence 2 Biomolecules 2 Biosynthesis 2 Bufo arenarum 2 Building blockes 2 Candida antarctica 2 Candida antarctica lipase B 2 Carbohydrates 2 Catalysis 2 Cells 2 Chemo-selectivity 2 Chemoselectivity 2 Comparative Study 2 Enzymatic hydrolysis 2 Enzymes 2 Female 2 Fungal Proteins 2 Geobacillus stearothermophilus 2