None are required.

Here is the procedure to install CLUSTALW from its source code:

• The source code archive was downloaded and put under /home/bioubuntu, decompressed and the created folder is moved toward /opt/bio/sources.

% sudo mv clustalw-2.1 /opt/bio/sources

• This folder should belong to root and its permissions should be set at 755.

% sudo chown -R root:root /opt/bio/sources/clustalw-2.1

• Once you are in /opt/bio/sources/clustalw-2.1, compilation is easily done:

% sudo ./configure && sudo make && sudo make install

• The application is now installed under /usr/local/bin/clustalw2