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Recombinant Viruses

Recombinant hemagglutinin esterase-expressing hepatitis viruses are reduced in fitness

Published in Gene Therapy Weekly, March 16th, 2006

According to recent research from the Netherlands published in the Journal of Virology, recombinant hemagglutinin esterase (HE)-expressing hepatitis viruses are reduced in fitness.

"Group 2 coronaviruses encode an accessory envelope glycoprotein species, the HE, which possesses sialate-O-acetylesterase activity and which, presumably, promotes virus spread and entry in vivo by facilitating reversible virion attachment to O-acetyllated sialic acids. While HE may provide a strong selective advantage during natural infection, many laboratory strains of mouse hepatitis virus (MRV) fail to produce the protein."

"Apparently," wrote A. Lissenberg and...

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