Department of Systems Biology, Technical University of Denmark, DK-2800 Lyngby, Denmark. LJ@bio.dtu.dk.|Department of Systems Biology, Technical University of Denmark, DK-2800 Lyngby, Denmark. LJ@bio.dtu.dk.|Department of Systems Biology, Technical University of Denmark, DK-2800 Lyngby, Denmark. LJ@bio.dtu.dk.|Department of Systems Biology, Technical University of Denmark, DK-2800 Lyngby, Denmark. LJ@bio.dtu.dk.|Department of Systems Biology, Technical University of Denmark, DK-2800 Lyngby, Denmark. LJ@bio.dtu.dk.