1XYK:
reference: Prion protein NMR structures of cats, dogs, pigs, and sheep., Lysek DA, Schorn C, Nivon LG, Esteve-Moya V, Christen B, Calzolai L, von Schroetter C, Fiorito F, Herrmann T, Guntert P, Wuthrich K, Proc Natl Acad Sci U S A 2005 Jan 18;102(3):640-5. Epub 2005 Jan 12. PMID: 15647367

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