stretcher(1) Needleman-Wunsch rapid global alignment of two sequences


stretcher -asequence sequence -bsequence sequence [-datafile matrix] [-gapopen integer] [-gapextend integer] -outfile align
stretcher -help



is a command line program from EMBOSS ("the European Molecular Biology Open Software Suite"). It is part of the "Alignment:Global" command group(s).


Input section

-asequence sequence

-bsequence sequence

-datafile matrix

This is the scoring matrix file used when comparing sequences. By default it is the file 'EBLOSUM62' (for proteins) or the file 'EDNAFULL' (for nucleic sequences). These files are found in the 'data' directory of the EMBOSS installation.

Additional section

-gapopen integer

Default value: @($(acdprotein)? 12 : 16)

-gapextend integer

Default value: @($(acdprotein)? 2 : 4)

Output section

-outfile align


Bugs can be reported to the Debian Bug Tracking system (, or directly to the EMBOSS developers (


Debian Med Packaging Team <[email protected]>

Wrote the script used to autogenerate this manual page.


This manual page was autogenerated from an Ajax Control Definition of the EMBOSS package. It can be redistributed under the same terms as EMBOSS itself.