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ATTAAAGGTT TATACCTTCC CAGGTAACAA ACCAACCAAC TTTCGAT... is part of the 5'UTR of genome of an RNA virus SARS-Cov-2.

RNA contains letters C+G+A+U.
DNA contains letters C+G+A+T.

Why are there letters T, in the SARS-Cov-2 genome, instead of U?

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We sequence and therefore typically report assemblies as DNA sequences, even if they're actually RNA.

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