* Clustal Omega: Fabian Sievers UCD Dublin, Ireland Andreas Wilm UCD Dublin, Ireland David Dineen UCD Dublin, Ireland Johannes Söding Gene Center Munich, Germany Michael Remmert Gene Center Munich, Germany * Clustal 2 Mark Larkin UCD Dublin, Ireland * Clustal 1.X Toby Gibson EMBL Heidelberg, Germany Des Higgins UCC Cork, Ireland Julie Thompson IGBMC Strasbourg, France * Contributors: Chenna Ramu EMBL Heidelberg, Germany Nigel Brown EMBL Heidelberg, Germany