Changes in protease activity in the skin surface ...



Title Changes in protease activity in the skin surface mucus of Atlantic salmon (Salmo salar) during sea lice (Lepeophtheirus salmonis) infestation
Author(s) K. J. Firth, N. W. Ross, John F. Burka, S. C. Johnson
Journal Bulletin of the Aquaculture Association of Canada
Date 1998
Issue 2
Start page 93
End page 95
Abstract Skin surface mucus contains a number of biologically active substances, including proteinases, shown or suspected to have a role in the innate (nonantibody) defence system of fish. The objective of this study was to determine whether proteinase activity in the skin surface mucus of fish is altered as a result of L. salmonis infestation. In 2 experiments in which S. salar were infested with L. salmonis, samples taken from infested fish showed increased proteinase activity compared to controls using 2 different assay methods. In particular, zymography of samples from infested fish showed a series of low molecular weight (17-20 kDa) proteinases that were not present in control samples..

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