Proteolytic Activity in the Sarcoplasmic Fluids of Parasitized Pacific Whiting ( Merluccius productus ) and Unparasitized True Cod ( Gadus macrocephalus )

Proteolytic Activity in the Sarcoplasmic Fluids of Parasitized Pacific Whiting ( Merluccius... ABSTRACT Proteolytic enzymes in the sarcoplasmic fluid of Pacific whiting (Merluccius productus) were studied to determine which proteases might be involved in the severe textural defect associated with this species. The results were compared to those obtained for true cod (Gadus macrocephalus), a fish having firm texture. Two pH optima of enzymic activity were noted for whiting, pH 3.5–3.9 and 7.1–7.2. Two pH optima were also observed for cod, pH 3.2–3.6 and 7.8–8.0. Whiting but not true cod contained enzymic activity similar to cathepsin B. Cathepsin C activity was greater in whiting than in cod. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Food Science Wiley

Proteolytic Activity in the Sarcoplasmic Fluids of Parasitized Pacific Whiting ( Merluccius productus ) and Unparasitized True Cod ( Gadus macrocephalus )

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Publisher
Wiley
Copyright
Copyright © 1983 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0022-1147
eISSN
1750-3841
DOI
10.1111/j.1365-2621.1983.tb09219.x
Publisher site
See Article on Publisher Site

Abstract

ABSTRACT Proteolytic enzymes in the sarcoplasmic fluid of Pacific whiting (Merluccius productus) were studied to determine which proteases might be involved in the severe textural defect associated with this species. The results were compared to those obtained for true cod (Gadus macrocephalus), a fish having firm texture. Two pH optima of enzymic activity were noted for whiting, pH 3.5–3.9 and 7.1–7.2. Two pH optima were also observed for cod, pH 3.2–3.6 and 7.8–8.0. Whiting but not true cod contained enzymic activity similar to cathepsin B. Cathepsin C activity was greater in whiting than in cod.

Journal

Journal of Food ScienceWiley

Published: Jul 1, 1983

References

  • Lipase release from lysosomes of rainbow trout (Salmo gairdneri) muscle subjected to low temperatures
    Geromel, Geromel; Montgomery, Montgomery
  • The colorimetric determination of leucine aminopeptidase in urine and serum of normal subjects and patients with cancer and other diseases
    Goldbarg, Goldbarg; Rutenberg, Rutenberg

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