6,866 مناظر · 01/17/24
Mad Cow Disease
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01/17/24
Researchers believe that the infectious agent that causes mad cow disease is an abnormal version of a protein normally found on cell surfaces, called a prion. For reasons still unknown, this protein becomes altered and destroys nervous system tissue -- the brain and spinal cord.
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6,866 مناظر · 01/17/24
