Does a "500 million-year-old hormone" disprove Darwin? Martin Hafner * ,1 and Gert Korthof † ,1 * Department of Experimental Immunology, German Research Centre for Biotechnology, Braunschweig, Germany; and † Centre for Biological Medicines and Medical Technology (BMT), National Institute for Public Health and the Environment, Bilthoven, The Netherlands 1 Correspondence: M.H., Department of Experimental Immunology, German Research Centre for Biotechnology, Mascheroder Weg 1, Braunschweig 38124, Germany; G. K., Centre for Biological Medicines and Medical Technology (BMT), National Institute for Public Health and the Environment, Antonie van Leeuwenhoeklaan 9, Bilthoven 3721 MA, The Netherlands. E-mail: martin.hafner@gbf.de IN A PAPER PUBLISHED by the FASEB Journal in 1999, Danielle Georges and Christian Schwabe described gene sequences from the tunicate Ciona intestinalis that were indistinguishable from porcine relaxin (1) . Newer data contradict that finding: recently published analyses of the C. intestinalis genome do not confirm the presence of relaxin sequences (2) . What might seem like a narrow issue of scientific fact has broader implications. To the delight of creationists and fans of intelligent design, the presence of similar relaxin sequences in pigs and sea squirts–species separated by 500 million years–has been used to cast genomic doubt on Darwinian evolution.
/lp/fed-of-american-socs-for-experimental-biology/does-a-500-million-year-old-hormone-disprove-darwin-y7lszlupZk