منابع مشابه
The Lipid-RNA World
The simplest possible beginning of abiogenesis has been a riddle from the last century, which is most successfully solved by the Lipid World hypothesis. However, origin of the next stages of evolution starting form lipids is still in dark. We propose a ‘Lipid-RNA World Scenario’ based on the assumption that modern stable lipid-RNA interactions are molecular fossils of an ancient stage of evolut...
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Small RNAs have burst on the scene as ubiquitous, versatile repressors of gene expression in plants, animals and many fungi. These tiny RNAs (~21-26 nt), which induce silencing through homologous sequence interactions, come in many guises: short interfering (si) RNAs (Elbashir et al., 2001), small temporal (st) RNAs (Pasquinelli et al., 2000), heterochromatic siRNAs (Reinhart and Bartel, 2002),...
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For nearly thirty years, nucleic acid biochemists have dreamed of a very special RNA molecule, still hypothetical, which is thought to have played a key role in the early history of life on earth and may enable the production of life in the laboratory. That molecule is an RNA enzyme, or ribozyme, with the ability to catalyze the replication of RNA molecules, including copies of itself. All know...
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what miller wants is a theatre of heightened consciousness. he speaks of two passions in a man, the passion to "feel" and the passion "know". he belives that we can have more of the latter. he says: drama is akin to the other inventions of man in that it ought to help us know more and not merely to spend our feelings. the writing of the crucible shows us that he is trying to give more heightene...
15 صفحه اولIntrons and the RNA World
The RNA World is a hypothesis about the origin of life based on the view that the most critical event is the emergence of a self-replicating molecule , a molecule that can both copy itself and mutate and, hence, evolve to more efficient copying (Gilbert 1986). Evolution works on variation and selection, and selection is always measured in terms of more efficient multiplication, the ability to m...
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ژورنال
عنوان ژورنال: Nature
سال: 2001
ISSN: 0028-0836,1476-4687
DOI: 10.1038/35082661