Affiliation: | (1) MRC Molecular Neuroscience Group; Department of Neurobiology, The Babraham Institute, CB2 4AT Babmham, Cambridge, UK;(2) The Wellcome Foundation, Wellcome Research Laboratories, Langley Court, South Eden Park Road, BR3 3BS Beckenham, Kent, UK;(3) Present address: Department of Molecular and Cell Biology, Wyeth Research (UK) Ltd, Huntercombe Lane South, SL6 0PH Taplow, Maidenhead, Berks, UK |