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

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2021-09-20T21:12:03.940Z
2021-09-20T21:12:03.940Z
Devon Ryan
<p><code>ATTAAAGGTT TATACCTTCC CAGGTAACAA ACCAACCAAC TTTCGAT...</code> is part of the 5'UTR of genome of an RNA virus SARS-Cov-2.</p>
<p>RNA contains letters <code>C</code>+<code>G</code>+<code>A</code>+<code>U</code>.<br />
DNA contains letters <code>C</code>+<code>G</code>+<code>A</code>+<code>T</code>.</p>
<p>Why are there letters <code>T</code>, in the SARS-Cov-2 genome, instead of <code>U</code>?</p>

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2022-02-23T17:51:00.177Z
This was also answered here: https://bioinformatics.stackexchange.com/questions/11353/why-does-the-fasta-sequence-for-coronavirus-look-like-dna-not-rna/11358#11358
M__
<genome><phylogenetics><rna><sars-cov-2><covid-19>
Why does the SARS-Cov2 genome has letter t
# Why does the SARS-Cov2 genome has letter t

(Asked by: username_0 on 2021-09-20)

`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`?

**Tags:** genome, phylogenetics, rna, sars-cov-2, covid-19
> **Comments:**
> **username_1**: This was also answered here: https://bioinformatics.stackexchange.com/questions/11353/why-does-the-fasta-sequence-for-coronavirus-look-like-dna-not-rna/11358#11358  

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## 1 answers

### Answer by username_2 on 2021-09-20. Score: 10

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


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