Swiss-Prot Group, Swiss Institute of Bioinformatics, 1211 Genève 4, Switzerland. anais.mottaz@isb-sib.ch|Swiss-Prot Group, Swiss Institute of Bioinformatics, 1211 Genève 4, Switzerland. anais.mottaz@isb-sib.ch|Swiss-Prot Group, Swiss Institute of Bioinformatics, 1211 Genève 4, Switzerland. anais.mottaz@isb-sib.ch|Swiss-Prot Group, Swiss Institute of Bioinformatics, 1211 Genève 4, Switzerland. anais.mottaz@isb-sib.ch