Clustal Omega — Multiple Sequence Alignment

Sequence input

Three input types are supported and detected automatically — no selector needed.

① FASTA ② Uniprot IDs ③ PDB IDs — detected automatically

Or upload a FASTA file

Upload takes priority over the text input above if both are provided.

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Options

Configure output format, thread count, and sequence ordering.

Output format

Threads

Output order

Results will appear on the next page with a download link.

Input examples

Click any example to load it into the input field.

① FASTA format

Sequences starting with > header lines. Minimum 2 sequences required.

>seq1
MKTAYIAKQRQISFVKWTKDQSILDLRNPNFEKISSNASNAAIGKIIPQISTLALNSLT
>seq2
MKTAYIAKQRQISFVKWTKEQSILDLRNPNFEKISSNASNAAIGKIIPQISTLALNSLT

② Uniprot IDs

Space or comma-separated Uniprot accession codes. Sequences fetched automatically.

P69905 P68871

③ PDB IDs

4-character PDB entry codes. FASTA sequences fetched automatically from RCSB.

4HHB 1A3N