Assertion: prion's structure | /r/HasProperty | entertained as reasonable candidates
Facets:
value: no longer
type: TEMPORAL
Source sentences:
text: No longer could structures such as a viroid-like nucleic acid, a replicating polysaccharide, or a small polynucleotide surrounded by a carbohydrate be entertained as reasonable candidates to explain the puzzling properties of the scrapie agent (58, 68).