Structural Genomics Group, The European Bioinformatics Institute, EMBL Outstation, Cambridge CB10 1SD, UK. lappe@ebi.ac.uk|Structural Genomics Group, The European Bioinformatics Institute, EMBL Outstation, Cambridge CB10 1SD, UK. lappe@ebi.ac.uk|Structural Genomics Group, The European Bioinformatics Institute, EMBL Outstation, Cambridge CB10 1SD, UK. lappe@ebi.ac.uk|Structural Genomics Group, The European Bioinformatics Institute, EMBL Outstation, Cambridge CB10 1SD, UK. lappe@ebi.ac.uk