1 The Bioinformatics Centre, Section for Computational and RNA Biology, Department of Biology and Biotech Research and Innovation Centre, University of Copenhagen, Ole Maaloes Vej 5, 2200 Copenhagen, Denmark.
2 Department of Molecular & Cell Biology, Institute for Systems Genomics, University of Connecticut, Storrs, CT 06269, USA.
3 Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14853, USA.
4 The Bioinformatics Centre, Section for Computational and RNA Biology, Department of Biology and Biotech Research and Innovation Centre, University of Copenhagen, Ole Maaloes Vej 5, 2200 Copenhagen, Denmark. Electronic address: albin@binf.ku.dk.
5 Centre for mRNP Biogenesis and Metabolism, Department of Molecular Biology and Genetics, C.F. Møllers Alle 3, Building 1130, 8000 Aarhus, Denmark. Electronic address: thj@mbg.au.dk.