Two papers published in the same issue of the "Journal of General Virology" show the discovery of a new protein "ORF5a", that is supposed to be linked with immune response against PRRS virus. This could lead to development of new tests or new approach to intervention.
Johnson C R, Griggs T F, Gnanandarajah J S, Murtaugh M P. 2011. Novel Structural Protein in Porcine Reproductive and Respiratory Syndrome Virus Encoded in an Alternative Open Reading Frame 5 Present in All Arteriviruses. Journal of general virology
Firth A E, Zevenhoven-Dobbe J C, Wills N M, Go Y, Balasuriya U, Atkins J F, Snijder E J, Posthuma C. 2011. Discovery of a small arterivirus gene that overlaps the GP5 coding sequence and is important for virus production. Journal of general virology
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