CLUSTAL W (1.83) Multiple Sequence Alignments

The input for ClustalW is limited to a maximum of 500 sequences or to a 10MB file (whichever is smaller). When the input file or the number of sequences is large, ClustalW can run for days and in some cases may not finish at all.

| Protein Sequences | DNA Sequences |

Enter or paste protein sequences below:


Fast Pairwise Alignments Parameters:
Word size (K-tuple):
Number of top diagonals:
Window size:
Gap penalty:
Score type:


Multiple Alignment Parameters:
Weight matrix:
Gap opening penalty:
Gap extension penalty:


Other Parameters:
Quicktree (always On):
Output order:



Comments and suggestions to: SBCR Support