1. Institute of Biological Sciences, University of Wales Aberystwyth, Sir George Stapledon Building, Penglais, Aberystziyth, Dyfed SY23 3DD, Wales, UK
2. Cell Biology Department, Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, Dyfed SY23 3EB, Wales, UK
3. Aberystwyth Cell Genetics Group