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Ontogeny of lipase expression in winter flounder

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The partial sequencing of two lipases from winter flounder Pseudopleuronectes americanus, one most closely related to gastric, lingual and lysosomal acid lipase from other vertebrates and one most closely related to bile salt-activated lipase, is reported. Biochemical analyses of enzymatic activity demonstrated the greater contribution made by bile salt-activated lipase relative to neutral bile salt-independent lipase. Using molecular techniques, the tissue-specific expression of bile salt-activated lipase in pancreatic tissue and acid triacylglycerol lipase in a wide variety of organs was demonstrated. Furthermore, the developmental expression of these types of lipase in larval fish was established.

Keywords: Pseudopleuronectes americanus; larvae; lipase; pancreas; pyloric caeca; stomach

Document Type: Regular Paper


Affiliations: Institute for Marine Biosciences, 1411 Oxford Street, Halifax, Nova Scotia, B3H 3Z1, Canada

Publication date: 2003-04-01

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