منابع مشابه
Porcine relaxin, a 500 million-year-old hormone?
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...
متن کاملDoes 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...
متن کاملDr. Laidlaw's prescription for the homeless.
In 1953, common lodging houses, working men’s hostels, seamen’s boarding houses and hostels for transport drivers and long distance crews were home to 7000 people in Glasgow. Most of the 5000 residents of the common lodging houses would now be called homeless – people having neither reasonable nor secure accommodation. Working men’s hotels, however, had a motley collection of individuals whose ...
متن کاملMicro-computed tomography of a 500-year-old tooth: technical note.
OBJECTIVE To determine whether micro-computed tomography (micro-CT) could be used to reconstruct ancient dental anatomy accurately and differentiate the enamel from the dentin, as well as to verify whether micro-CT could detect tooth disorders such as attrition or caries accurately. METHODS Micro-CT imaging was performed, using a cone-beam micro-CT specimen scanner, on a 500-year-old human to...
متن کاملThe complete mitogenome of a 500-year-old Inca child mummy
In 1985, a frozen mummy was found in Cerro Aconcagua (Argentina). Archaeological studies identified the mummy as a seven-year-old Inca sacrifice victim who lived >500 years ago, at the time of the expansion of the Inca Empire towards the southern cone. The sequence of its entire mitogenome was obtained. After querying a large worldwide database of mitogenomes (>28,000) we found that the Inca ha...
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ژورنال
عنوان ژورنال: BMJ
سال: 1994
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.308.6932.803