THE DIGESTIVE ENZYMES OF THE PACIFIC BROWN SHRIMP PENAEUS-CALIFORNIENSIS .1. PROPERTIES OF AMYLASE ACTIVITY IN THE DIGESTIVE-TRACT

被引：67

作者：

VEGAVILLASANTE, F

NOLASCO, H

CIVERA, R

机构：

来源：

COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY | 1993年 / 106卷 / 03期

关键词：

D O I：

10.1016/0305-0491(93)90130-W

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

1. Crude extract of the whole digestive tract from the brown shrimp (P. californiensis) was investigated for digestive amylase activity. 2. Considerable amylase activity was found at pH 6.5-8.0, with optimum pH at around 7.5. 3. Optimum temperature was. found between 30-40-degrees-C, similar to amylases from other crustaceans. 4. Amylase activity was highly halotolerant, having 50% maximum activity at 3 M NaCl. 5. Maximum amylase activity was found at 0.01 M NaCl. 6. Amylase activity was partially inhibited by the divalent ions Hg2+, Zn2+, Cu2+ and Cr+. 7. Mg2+ and Ca2+ ions seemed to enhance amylase activity.

引用

页码：547 / 550

页数：4

共 15 条

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