found: Work cat: Szulik, M. W. Oxidation of cytosine in DNA, c2014:((DNA is a polyanion at neutral pH. It usually appears as a doublestranded helix composed of two biopolymers that are made of nucleotides. Nucleotides comprise: purines Guanine (G) and Adenine (A), and pyrimidines Cytosine (C) and Thymine (T))
found: MeSH, viewed September 6, 2016(Cytosine; A pyrimidine base that is a fundamental unit of nucleic acids)
found: U.S. National Library of Medicine, Genetics Home Reference. What is DNA, viewed September 6, 2016(The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T))
