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Old 15-02-2012, 07:48 PM   #1
Diane
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Lightbulb A third mechanism of evolution

Prions point to a new style of evolution

Quote:
..'protein mutations', or prions, have a strong impact on [the physical appearance of an organism], so not all evolution is occurring through a DNA change
...at least in yeast.
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Old 15-02-2012, 07:58 PM   #2
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More about the topic: Prions and chaperones: Outside the fold

Quote:
Lindquist's... work over the past 20 years has consistently challenged standard thinking on evolution, inheritance and the humble yeast. She has helped to show how misfolded infectious proteins called prions can override the rules of inheritance in yeast, and how this can be used to model human disease. She has also proposed a mechanism by which organisms can unleash hidden variation and evolve by leaps and bounds. She was the first female director of the prestigious Whitehead Institute for Biomedical Research in Cambridge, Massachusetts, and has received more than a dozen awards and honours in the past five years. In a paper being published this week in Nature, she and her colleagues show that in wild yeast, prions provide tangible advantages, such as survival in harsh conditions and drug resistance1.
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www.dermoneuromodulation.com
SensibleSolutionsPhysiotherapy
HumanAntiGravitySuit blog
Neurotonics PT Teamblog
Canadian Physiotherapy Pain Science Division (Archived newsletters, paincasts)
Canadian Physiotherapy Association Pain Science Division Facebook page
@PainPhysiosCan
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@WCPTPTPN
Neuroscience and Pain Science for Manual PTs Facebook page

@dfjpt
SomaSimple on Facebook
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"Rene Descartes was very very smart, but as it turned out, he was wrong." ~Lorimer Moseley

“Comment is free, but the facts are sacred.” ~Charles Prestwich Scott, nephew of founder and editor (1872-1929) of The Guardian , in a 1921 Centenary editorial

“If you make people think they're thinking, they'll love you, but if you really make them think, they'll hate you." ~Don Marquis

"In times of change, learners inherit the earth, while the learned find themselves beautifully equipped to deal with a world that no longer exists" ~Roland Barth

"Doubt is not a pleasant mental state, but certainty is a ridiculous one."~Voltaire
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