PRIONS, INFECTIOUS PARTICLES. “The term “prion” is derived from proteinacious infectious particle and refers to the pathogen that causes transmissible spongiform encephalopathies (TSEs). This small infectious particle is a disease-causing form of a protein called cellular prion protein (PrPc). PrPc is mainly found on the surface of cells in the central nervous system, but it is also located in other bodily tissues.”
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