Does a “500 million‐year‐old hormone” disprove Darwin?
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Does a "500 million-year-old hormone" disprove Darwin?
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 scie...
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The fossil record of tunicates reaches back to the upper Cambrian period. Ascidians have mobile, tadpole-like juvenile forms with a notochord, which inspired the classification of tunicates as Urochordata, i.e., predecessors of vertebrates. The genome of the tunicate Ciona intestinalis contains a relaxin coding region that is organized like a mammalian gene, i.e., signal peptide, B-chain domain...
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The idea of biological evolution has a complex history throughout science and society. In Darwin, Darwin College at Cambridge University brings together nine scholars from diverse fields to discuss the legacy of the college namesake. This series of highly accessible lectures, intended for a popular audience, presents Darwin’s theory as both a vital part of our culture and an ongoing global deba...
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ژورنال
عنوان ژورنال: The FASEB Journal
سال: 2006
ISSN: 0892-6638,1530-6860
DOI: 10.1096/fj.06-0705ufm