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Created page with "== Introduction == Cytosine is one of the four main nucleobases found in the nucleic acids DNA and RNA, the others being adenine, guanine, and thymine (or uracil in RNA). This pyrimidine derivative has the chemical formula C₄H₅N₃O and is characterized by a heterocyclic aromatic ring structure. Cytosine plays a crucial role in the storage and expression of genetic information, participating in the formation of base pairs with guanine through three hydrogen..."
