This applet allows to find the best alignment between two sequences of amino acids. If you have accepted the certificate, this tool reads the sequences from a unique file or two files.

Selecting the radio button "unique file" it's possible to load a text file containing two sequences with this format:

>Name1
Sequence1
>Name2
Sequence2

Alternatively selecting "two files" it's possible to load two fasta sequences from two distinct files saved with the extension .fasta, .fa or .txt. The result of the computation is shown in a frame containing an histogram representing the Blosum spectrum.
If you have some problem to view it correctly, it depends on the version of your JRE. In order to resolve the problem, please download the latest version of JRE (>5.0).

Saving the result in html format there isn't any visualization problem. If you decide to save the computation, a dialog is shown to select the directory which will contain the output file.