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Watson-Crick base pairs in a siRNA (hydrogen atoms are not shown)
Each nucleotide in RNA contains a ribose sugar, with carbons numbered 1′ through 5′. A base is attached to the 1′ position, generally adenine (A), cytosine (C), guanine (G) or uracil (U). A phosphate group is attached to the 3′ position of one ribose and […]
