{{Genotype
|rsid=1799990
|allele1=A
|allele2=G
|magnitude=2
|repute=Good
|summary=Resistance to Prion Disease (PrP 129 Met/Val heterozygote)
}}
This genotype codes for Met/Val heterozygote at codon 129 in [[PrP]], the Prion Protein. This is strongly protective against development of [[Prion disease]], including sporadic and infectious [[Creutzfeldt-Jakob disease]].

Studies in Papua New Guinea showed that this genotype prevents transmission of [[kuru]] {{PMID|19923577}}, a form of Prion disease transmitted by cannibalism. So eat as many brains as you want!