[1] Univ Manchester, Dept Comp Sci, Manchester M13 9PL, Lancs, England
[2] Univ Manchester, Sch Biol Sci, Manchester M13 9PT, Lancs, England
[3] European Bioinformat Inst, Hinxton CB10 1SD, Cambs, England
[4] Univ Manchester, Sch Biomol Sci, Manchester M60 1QD, Lancs, England
[5] Univ Aberdeen, Inst Med Sci, Sch Med Sci, Aberdeen AB25 2ZD, Scotland
[6] John Innes Ctr Plant Sci Res, Dept Mol Microbiol, Norwich NR4 7UH, Norfolk, England
[7] Univ Edinburgh, Sch Med, Scottish Ctr Genom Technol & Informat, Edinburgh EH16 4S, Midlothian, Scotland
[8] Univ Cambridge, Dept Biochem, Cambridge CB2 1QW, England
[9] Univ Manchester, Dept Chem, Manchester M60 1QD, Lancs, England