SEARCH Articles Figures Tables Acid dissociation constant purine and pyrimidine bases Annelated Pyrimidines (Except Purines, Pteridines, and Flavins) Ascaris spp purine and pyrimidine metabolism Aza analogs, of pyrimidine and purine Aza analogs, of pyrimidine and purine bases Base Pairing in the Purine and Pyrimidine Crystal Structures Base-Pair Configurations with Purine and Pyrimidine Homo-Association Bases purine and pyrimidine Coordination of Purine and Pyrimidine Nucleotide Biosynthesis Deoxyribonucleic acid purine and pyrimidine bases Electron Affinities of Purines and Pyrimidines Fused Pyrimidines Purines and Pteridines Gut, J., Aza Analogs of Pyrimidine and Purine Halogenated Pyrimidines and Purines Heterocyclic compounds Purine Pyridine Pyrimidine Leishmania spp purine and pyrimidine metabolism Nucleic acids purines and pyrimidines Nucleotides Purine Pyrimidines Properties of Purine and Pyrimidine Bases Purine and Pyrimidine Structures Purine and pyrimidine biosynthesis Purine and pyrimidine metabolism Purine and pyrimidine nucleotide Purine and pyrimidine nucleotide biosynthesis Purine and pyrimidine synthesis Purine and pyrimidine transport Purine pyrimidine and Purine-Pyrimidine Metabolism Purine-pyrimidine base pairing Purine-pyrimidine base pairs Purine-pyrimidine base pairs mismatch Purine-pyrimidine complexes Purine-pyrimidine hairpin Purine-pyrimidine pairs, steroids Purine-pyrimidine transversions Purine/pyrimidine ratio Purine:pyrimidine, Watson-Crick Purines pyrimido pyrimidines Purines tetrazolo pyrimidine Purines, Pyrimidines and Nucleosides Purines, Pyrimidines, and Other Basic N-Compounds Pyrimidine Nucleoside Bases, Purines, Nucleotides, Nucleosides, and Nucleic Acids Pyrimidine and Purine Derivatives Pyrimidine and Related Compounds Excluding Purines Pyrimidine and purine radiation products problematic cases Pyrimidine nucleoside bases and purines Pyrimidine, Purine, and Related Alkaloids Pyrimidine-purine dinucleosides Ribonucleic acid purine and pyrimidine bases Solubility purine and pyrimidine bases Substituted purines and pyrimidines Trypanosoma spp purine and pyrimidine metabolism Van der Waals contact surfaces of purines and pyrimidines Watson-Crick purine-pyrimidine base