[1] European Bioinformat Inst, Cambridge CB10 1SD, England
[2] Univ Cambridge, Dept Genet, Cambridge CB2 3EH, England
[3] Sanger Ctr, Cambridge CB10 1SA, England
[4] Univ Montpellier, Sch Med, IGH, CNRS, F-34396 Montpellier 5, France
[5] Fac Med, CNRS, Unite Propre Rech 41, F-35043 Rennes, France
[6] European Mol Biol Lab, Heidelberg, Germany
[7] Fdn Res & Technol Hellas, Inst Mol Biol & Biotechnol, Heraklion, Greece
[8] Univ Crete, Dept Biol, Heraklion, Greece
[9] Univ Autonoma Madrid, E-28049 Madrid, Spain
[10] CSIC, Ctr Biol Mol Severo Ochoa, E-28049 Madrid, Spain
[11] Max Planck Inst Biophys Chem, Dept Mol Dev Biol, D-37070 Gottingen, Germany
[12] Univ Dundee, Dept Anat & Physiol, Canc Res Campaign, Cell Cycle Genet Grp, Dundee DD1 4HN, Scotland
[13] Open Univ, Dept Biol Sci, Milton Keynes MK7 6AA, Bucks, England