Higgins, D.G., Bleasby, A.J. and Fuchs, R. (1992) CLUSTAL V: improved software
for multiple sequence alignment. Computer Applications in the Biosciences
(CABIOS), 8(2):189-191.
Thompson J.D., Higgins D.G., Gibson T.J. "CLUSTAL W: improving the sensitivity
of progressive multiple sequence alignment through sequence weighting,
position-specific gap penalties and weight matrix choice." Nucleic Acids Res.
22:4673-4680(1994).