منابع مشابه
The Basal Ganglia Over 500 Million Years
The lamprey belongs to the phylogenetically oldest group of vertebrates that diverged from the mammalian evolutionary line 560 million years ago. A comparison between the lamprey and mammalian basal ganglia establishes a detailed similarity regarding its input from cortex/pallium and thalamus, as well as its intrinsic organisation and projections of the output nuclei. This means that the basal ...
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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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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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ژورنال
عنوان ژورنال: Nature
سال: 1991
ISSN: 0028-0836,1476-4687
DOI: 10.1038/353292a0