Purines are heterocyclic compounds composed of a pyrimidine ring and an imidazole ring and are the main components of nucleic acids. Their derivatives, such as adenine, guanine, and xanthine, are […]
Introducation Nucleosides, composing of a nucleobase (A, T, C, G or U) and a pentofuranose (ribose or 2-deoxyribose), are the fundamental units of the genetic material (DNA and RNA) for […]