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Updated: Jul 2, 2026

Detection of Abnormal Prion Protein by Immunohistochemistry
Published on: May 5, 2023
Prion protein gene polymorphisms in sheep in the state of Paraná, Brazil
C S Sotomaior1, V S Sotomaior, H M F Madeira
1Programa de Doutorado em Processos Biotecnológicos da Universidade Federal do Paraná, UFPR, Centro Politécnico, Curitiba, Paraná 81531-990, Brazil.
Abstract:
To determine the polymorphisms of the prion protein gene in sheep from the state of Paraná, Brazil, 323 animals of meat breeds (Suffolk, Hampshire Down, Texel, Ile de France, Dorper, Dorset, Santa Inês and crossbreds) were genotyped by restriction fragment length polymorphism (RFLP) analysis. The most frequent allele was ARQ, with a frequency of 0.61, followed by ARR (0.30). VRQ and AHQ alleles were present at very low frequencies (0.13 and 0.05 respectively), and the ARH allele was not found. Seven genotypes were identified (ARR/ARR, ARR/ARQ, ARQ/ARQ, ARR/VRQ, ARR/AHQ, ARQ/VRQ and ARQ/AHQ), of which ARQ/ARQ was the most frequent (0.41). The Santa Inês breed and crossbred animals showed the highest genotypic variability.
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