PRNP and prion disease: Polymorphism at codon 129 of prion gene was available in 13 npRPD and 101 CJD patients (87 sporadic CJD and 14 genetic prion diseases patients) and PrP molecular typing in 44, with 41 sporadic CJD patients having both the polymorphism met/val at codon 129 and PrP typing (Supplemental material, Table 1).