Int. J. Dev. Biol. 44: 43 - 50 (2000) https://doi.org/10.1387/ijdb.10761846 The introduction of Xenopus laevis into developmental biology: of empire, pregnancy testing and ribosomal genes Download PDF SECTIONS Title Abstract TOOLS Export Citation J B Gurdon and N Hopwood Wellcome CRC Institute, University of Cambridge, United Kingdom. j.gurdon@welc.cam.ac.uk Abstract