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Anim Genet. 1995 Jun;26(3):189-91.

A rapid PCR-based test for the endogenous viral element ev3 of chickens.

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Agriculture and AgriFood Canada, Centre for Food and Animal Research, Ottawa, Ontario.


A short fragment of chicken genomic DNA encompassing the insertion site of the endogenous avian leucosis viral element ev3 was isolated using the inverse polymerase chain reaction (inverse PCR) technique. The nucleotide sequence of the unoccupied site was used to design PCR primers that can be used to unambiguously determine the genetic status of any chicken, with respect to ev3. Screening of a small number of individuals from exotic breeds of chickens suggested that the frequency of ev3 is highly variable. The ev3 integration site shows a high degree of sequence homology with the macrophage-specific tyrosine kinase gene, bmk, in mice.

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