INFECTIOUS PARTICLES. “Prions are proteins, but they are proteins that are not behaving properly. This is because their normal three-dimensional shape has changed, and they can no longer do their job. But not only can they not do their job, but they actual cause damage to the cells. But what is surprising to researchers about prions is that prions are infectious — they can make more proteins have the wrong three-dimensional shape, spreading the damage they do.”
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