uracil
A common and naturally occurring pyrimidine nucleobase in which the pyrimidine ring is substituted with two oxo groups at positions 2 and 4. Found in RNA, it base pairs with adenine and replaces thymine during DNA transcription.
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04. Bioactive Capabilities of Specific Chemicals : Oxidoreductases [EC:1] > Acting on the CH-CH group of donors [EC:1.3]