Hello,

The tool is called awk.
There is also another tool called Perl, but I won't recommend it.

Regards,
F.

On 05/08/2012 04:02 PM, K Singh wrote:
Dear All
I was looking for a script or an informatics tool enabling me to
change the sequence from FASTA format to something like following:

FASTA FORMAT
abcdefghijklmnopqrstuvwxyz

to

   1  abcde fghij
11  klmno pqrst
21  uvwxy z


Many thanks in advance

Regards
Kris

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