| identification of a novel ovine prp polymorphism and scrapie-resistant genotypes for st. croix white and a related composite breed. | susceptibility to scrapie is primarily controlled by polymorphisms in the ovine prion protein gene (prnp). here, we report a novel ovine exon three prnp polymorphism (snp g346c; p116), its association with the ovine arq allele (p116a136r154q171), and two new genotypes (parq/arr; parq/arq) for the st. croix white (scw) breed and a related composite (cmp) breed developed for meat production. the (p116) polymorphism occurs between the n-terminal cleavage site and the hydrophobic region of the ovine ... | 2003 | 14970684 |