Effects of temperature, pH and NaCl on protease activity in digestive tract of young turbot,Scophthalmus maximus

Chen Muyan; Zhang Xiumei; Gao Tianxiang; Chen Chao

doi:10.1007/PL00020776

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Effects of temperature, pH and NaCl on protease activity in digestive tract of young turbot,Scophthalmus maximus

Updated：2023-05-16

- Effects of temperature, pH and NaCl on protease activity in digestive tract of young turbot,Scophthalmus maximus
- Journal of Oceanology and Limnology Vol. 24, Issue 3, Pages: 300-306(2006)
- Affiliations：
  
  1. Fishery College Ocean University of China
  2. Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences
- Author bio：
- Funds：
- DOI：10.1007/PL00020776
  CLC：
- Published：2006
- Accepted：
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Muyan, C., Xiumei, Z., Tianxiang, G. et al. Effects of temperature, pH and NaCl on protease activity in digestive tract of young turbot,Scophthalmus maximus, ., Chin. J. Ocean. Limnol. 24, 300–306 (2006). https://doi.org/10.1007/PL00020776
DOI：

Muyan, C., Xiumei, Z., Tianxiang, G. et al. Effects of temperature, pH and NaCl on protease activity in digestive tract of young turbot,Scophthalmus maximus, ., Chin. J. Ocean. Limnol. 24, 300–306 (2006). https://doi.org/10.1007/PL00020776 DOI：

摘要

Abstract

The protease activity in digestive tract of young turbotScophthalmus maximum was studied

and the optimal pH

temperature and NaCl concentration were determined for different portions of the fish's internal organs. The optimal activity in the fish's stomach was at pH of 2.2

while that in the intestinal extracts was within the alkaline range from 9.5 to 10.0. In hepatopancreas

the optimal pH was in low alkalinity at 8.5. The optimal reaction temperature was above 40°C in stomach

intestine and hepatopancreas. With increasing temperature

the pH value increased in stomach

while in the intestine

an opposite tendency was observed due to combined effect of pH and temperature. NaCl concentration showed inhibitory impact on protein digestion in hepatopancreas. The main protease for protein digestion in turbot seemed to be pepsin. Moreover

the maximum protease activity in different segments of intestine existed in the hindgut.

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Keywords

references

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