Transfer of a prion strain to different hosts leads to emergence of strain variants.

Abstract excerpt

Prions consist mainly of PrP(Sc), a pathogenic conformer of host-encoded PrP(C). Prion populations with distinct phenotypes but associated with PrP(Sc), having the same amino acid sequence, constitute distinct strains. Strain identity is thought to be encoded by the conformation of PrP(Sc) and to be maintained by seeded conversion. Prion strains can be distinguished by the cell panel assay, which measures their...

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