Protein Statistics

Protein sequences

Output

How to get the amino acid composition of a protein

Paste one or more protein sequences, as plain text or FASTA.
The count and percent of each amino acid appear, followed by the acidic, basic, charged, polar, hydrophobic and aromatic groups.
Copy output or Download saves the result.

Frequently asked questions

Which residues are in each group?

The letters are listed next to each group: acidic D and E; basic H, K and R; polar N, C, Q, S, T and Y; hydrophobic A, I, L, M, F, W and V; aromatic F, W and Y.

Is my sequence uploaded?

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

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