?url_ver=Z39.88-2004&rft_id=PQ+ETD%3A592989&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=JD&rft.aulast=Leslie&rft.au=Leslie%2C+JD&rft.degree=Doctoral&rft.date=30+September+2007&rft.inst=UCL+(University+College+London)&rft.tpages=182&rft.title=Studies+on+the+function+of+Delta+proteins+in+the+zebrafish