Filter Sequence

Sequences

Sequence typeOther lettersOther letters Change U to TLetter caseLine length

Output

How to clean up a DNA or protein sequence

Paste a sequence copied from anywhere, with numbers, spaces or other characters in it.
Choose DNA or protein, and whether other letters are removed or replaced with N or X. For DNA, tick Change U to T to turn RNA into DNA.
Set the letter case and line length. Copy output or Download saves the result.

Frequently asked questions

Which letters are kept?

For DNA: A, C, G, T, U and the IUPAC ambiguity codes R, Y, S, W, K, M, B, D, H, V and N. For protein: the 20 standard amino acids, B, Z, X, U (selenocysteine), O (pyrrolysine) and * for a stop.

Is my sequence uploaded?

No. Everything runs in your browser, so your sequences never leave your device.

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