Metabolism in marine flatfish-IV. Carbohydrate and protein digestion in Atlantic halibut (Hippoglossus hippoglossus L.)

H J Glass, N L MacDonald, J Roger Stark

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    1. 1. A survey of the digestive enzymes present in Atlantic halibut has been carried out. 2. 2. The endoproteases pepsin, chymotrypsin, trypsin and elastase and the exoproteases leucine aminopeptidase and carboxypeptidases a and b were identified together with activity towards casein at pH 4.5-5.3. 3. 3. The main carbohydrase activities were a-amylase and a-glucosidase. 4. 4. Although the activity towards p-nitrophenyl N-acetylglucosaminide, was strong in all zones of the alimentary tract, there were only trace amounts of chitinase activity. 5. 5. With the exception of chymotrypsin and elastase, all hydrolytic enzymes were most active in extracts of pyloric caeca. 6. 6. A comparison has been made between the intestinal glycosidases of halibut and those of rat. © 1987.

    Original languageEnglish
    Pages (from-to)281-289
    Number of pages9
    JournalComparative Biochemistry and Physiology Part B: Comparative Biochemistry
    Issue number2
    Publication statusPublished - 1987


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