Question

the infectious substances of prions is​

Answer 1

Prions are misfolded proteins which characterize several fatal neurodegenerative diseases in humans and many other animals.[1] It is not known what causes the normal protein to misfold; the abnormal three-dimensional structure is suspected of conferring infectious properties. The word prion derives from "proteinaceous infectious particle".[2][3][4] Prions composed of the prion protein (PrP) are hypothesized as the cause of transmissible spongiform encephalopathies (TSEs),[5] including scrapie in sheep, chronic wasting disease (CWD) in deer, bovine spongiform encephalopathy (BSE) in cattle (commonly known as "mad cow disease"), and Creutzfeldt-Jakob disease (CJD) in humans.