A.T. A.Kossel and study on chemical composition of Levene nucleic acid. Nucleic acid from animal cells, has main elements nitrogen and has a property called nucleotide base, so tide clock base (Nucleotide base) or grown rachi (Nitrogenous base), nat bass has a different chemical structure, divided into two categories-your green (Purine) is a structured base with 2 bands, split ring, as types is a good 2 nin nin (Adenine) kwa (Guanine)-fiber-Dean (Pyrimidine) is a structured base with 1 ring band is divided into two types, namely thymine (Thymine) and master scene (Cytosine).
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