Bioinformatics Research Group at the John Innes Centre, Colney, Norfolk, UK. george.savva@bbsrc.ac.uk|Bioinformatics Research Group at the John Innes Centre, Colney, Norfolk, UK. george.savva@bbsrc.ac.uk|Bioinformatics Research Group at the John Innes Centre, Colney, Norfolk, UK. george.savva@bbsrc.ac.uk