Uracil (; U) is one of the four nucleobases in the nucleic acid RNA that are represented by the letters A, G, C and U. The others are adenine (A), cytosine (C), and guanine (G). In RNA, uracil binds to adenine via two hydrogen bonds. In DNA, the uracil nucleobase is replaced by thymine. Uracil is a demethylated form of thymine.
Uracil is a common and naturally occurring pyrimidine derivative. The name 'uracil' was coined in 1885 by the German chemist Robert Behrend, who was attempting to synthesize ...
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