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M. Baylis, F. Houston, W. Goldmann, N. Hunter, A. McLean (2000)
The signature of scrapie: differences in the PrP genotype profile of scrapie–affected and scrapie-free UK sheep flocksProceedings of the Royal Society of London. Series B: Biological Sciences, 267
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(2005)
The Society for Applied Microbiology
M. Tranulis, M Ulvund, B. Bratberg, A. Osland (1999)
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Aims: To analyse the frequencies of prion (PrP) gene haplotypes in UK sheep flocks and evaluate their relevance to transmissible spongiform encephalopathies (TSEs) and TSE resistance breeding programmes in sheep. Methods and Results: Genomic DNA isolated from sheep blood was PCR amplified for the coding region of the PrP gene and then sequenced. This study has analysed the sequence of PrP between codons 110 and 245 in 6287 ARQ haplotypes revealing a total of eight variant sequences, which represent a higher than expected 41% of all ARQ haplotypes. The additional PrP gene dimorphisms were M112T, L141F, M137T, H143R, H151C, P168L, Q175E and P241S. Conclusion: The results do not suggest a correlation between the occurrence of a specific ARQ haplotype and the scrapie disease status of a flock. The ARQ haplotype variability appears to be different in the UK sheep flocks compared with sheep flocks from outside the UK. Significance and Impact of the Study: Additional PrP dimorphisms may impact on the methodologies used for standard PrP genotyping in sheep breeding programmes. Some of these polymorphisms were found with significant frequencies in the UK sheep flocks and should therefore be considered in breeding programmes.
Journal of Applied Microbiology – Wiley
Published: Jun 1, 2005
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