ABSENCE OF BETA-GALACTOSIDASE (LACTASE) ACTIVITY FROM INTESTINAL BRUSH-BORDERS OF SUCKLING MACROPODS - IMPLICATIONS FOR MECHANISM OF LACTOSE ABSORPTION

被引：11

作者：

CRISP, EA ^{[1
]}

CZOLIJ, R ^{[1
]}

MESSER, M ^{[1
]}

机构：

[1] UNIV SYDNEY, DEPT BIOCHEM, SYDNEY, NSW 2006, AUSTRALIA

来源：

COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY | 1987年 / 88卷 / 03期

关键词：

D O I：

10.1016/0305-0491(87)90265-3

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. Neutral .beta.-galactosidase (lactase) activity was absent from crude brush borders of small intestines of three species of suckling macropods (kangaroos and wallabies), even though the intestinal mucosal homogenates had high .beta.-galactosidase activities. 2. These activities were entirely due to an intracellular acid .beta.-galactosidase, probably located in lysosomes. 3. The results suggest that the absorptive-digestive mechanism for lactose in macropods is fundamentally different from that in eutherian mammals.

引用

页码：923 / 927

页数：5

共 29 条

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