Sunday, April 17, 2011

IB Biology Microbes, Proteins and Prions for Option F

Spongiform Encephalopathies
Sheep called scrapie, Cattle called BSE, Humans called CJD.
Caused by protein ( prion protein or PrPSc )
Keywords are
Protein misfold, Prion, Heat stable, Enzyme resistant, CJD, Conformational change, Lack nucleic acid, Proteinaceous particles, From alpha to beta structure, Nervous system, Brain, Alzheimer

Prion Theory/Mad Cow Disease

Source taken from

Video on Mad Cow Disease in YouTube

Animation in Prion explained.
Click HERE to get in
Nobel Prize in Medicine 2007 was awarded to Stanley B Prusiner.
Click HERE to get in
For the discovery of Prions or Proteinaceous
All this time our understanding is that Diseases are caused by bacteria, virus, fungi or parasites which have a GENOME or NUCLEIC ACID  material that is able to replicate. 
Now it is a Protein, without any genomic and unable to replicate

Shows how little we know as Science mysteries unfold with time..................


  1. muy buena imagen sobre Prion Theory/Mad Cow Disease y gracias x el video de la animacion esta excelent!!

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    Did you know you can get these ON AUTO-PILOT & ABSOLUTELY FOR FREE by using Like 4 Like?


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