Assertion: prion's material | /r/HasProperty | terry et al.
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Source sentences:
text: In contrast infectious ex vivo PrP rods (B) are ~20 nm wide and are composed of two fibers (each with a double helical substructure) separated by a central gap of 8–10 nm in width which is filled with irregularly structured material (Terry et al., 2016, 2019).