AMJZ - Westaway,D.; Zuliani,V.; Cooper,C.M.; Da Costa,M.M.; Neuman,S.; Jenny,A.L.; Detwiler,L.; Prusiner,S.B. - Homozygosity for prion protein alleles encoding glutamine-171 renders sheep susceptible to natural scrapie - Genes and Development 1994 Apr 15; 8(8): 959-69