Nucleobases Nucleobases Constituents of Nucleic acid such as DNA and RNA. Purine(R) Pyrimidine(Y) Adenine(A) Guanine(G) Cytosine(C) Thymine(T) Uracil(U) 5-Methylcytosine 6-Methyladenine Number Purine ring Pyrimidine ring nucleic_acid nucleobase ,
Nucleotide definition by IUPAC Nucleotide definition by IUPAC CharATGCNomenclature of nucleobase G GGuanine A AAdenine T TThymine C CCytosine U UUracil R G or ApuRine Y T or CpYrimidine M A or CaMino at 6-purine on 2-pyrimidine K G or TKeto at 6-purine / 2-pyrimidine S G or CStrong interaction(H-bonds x 3) W A or TWeak interaction(H-bonds x 2) , ,
Purine Purine A series of heterocyclic compounds that are variously substituted in nature and are known also as purine bases. They include adenine and guanine, constituents of nucleic acids, as well as many alkaloids such as caffeine and theophylline. Uric acid is the metabolic end product of purine metabolism. , ,