Effects of Cd2+, Cu2+, Pb2+ and Zn2+ on activities of some digestive enzymes in carp (Cyprinus carpio L.)

被引：20
|
作者：
Kotorman, M [1 ]
László, K [1 ]
Nemcsók, J [1 ]
Simon, LM [1 ]
机构：
[1] Univ Szeged, Dept Biochem, H-6701 Szeged, Hungary
来源：
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING | 2000年 / 35卷 / 09期
关键词：
Cd2+; Cu2+; Pb2+; Zn2+; carp; trypsin; alpha-chymotrypsin; carboxypeptidase A; lipase acitivity;
D O I：
10.1080/10934520009377052
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The effects of haevy metals (Cd2+, Cu2+, Pb2+ and Zn2+) on activities of carp trypsin, alpha-chymotrypsin, carboxypeptidase A and lipase were studied. The enzymes were isolated from the gastrointestinal tract and the effects of metal ions were investigated during incubation for 5 min. The presence of Cd2+ did not influence the activities of CPA and trypsin and 10-20 % inhibiton was observed with alpha-chymotrypsin and lipase. Cu2+ Only slightly influenced the trypsin and lipase activities, whereas the alpha-chymotrypsin activity was decreased. All enzyme activities decreased at higher Zn2+ concentrations. The inhibition was most pronounced at alpha-chymotrypsin (more than 50%). With the exception of trypsin, Pb2+ inhibited the activities of the investigated enzymes.
引用
收藏
页码：1517 / 1526
页数：10
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