Infectious pancreatic necrosis birnavirus Vp4 peptidase (, infectious pancreatic necrosis virus protease, IPNV Vp4 protease, IPNV Vp4 peptidase, NS protease, NS-associated protease, Vp4 protease) is an enzyme. This enzyme catalyses the following chemical reaction
Infectious pancreatic necrosis virus is a birnavirus that causes an acute, contagious disease in young salmonid fish.