Each dNTP contains a phosphate group, a sugar group, and one of four nitrogenous bases [adenine (A),thymine (T), guanine (G), or cytosine (C)].
Each dNTP contains a phosphate group, a sugar group, and one of four nitrogenous bases [adenine (A),thymine (T), guanine (G), or cytosine (C)]. The dNTPs are strung together in a linear fashion by phosphodiester covalent bonds between the sugar of one dNTP and the phosphate group of the next; this repeated sugar-phosphate pattern makes up the sugar-phosphate backbone.