Bovine spongiform encephalopathy is thought to be caused by prions, but researchers in the UK have demonstrated the occurrence of BSE-like symptoms in mice without the characteristic holes in the brain. Just when you think you've answered one question, another one pops up. http://www.newscientist.com/article/mg19626274.300-absent-prions-blow-hole-in-bse-theory.html
Julie
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