EFFECT OF DENERVATION ON THE (NA+,K+)ATPASE ACTIVITY OF ELECTROPHORUS-ELECTRICUS (L) ELECTROCYTE

被引：5
作者：
GOMESQUINTANA, E
NUNES, GA
HASSONVOLOCH, A
机构：
来源：
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY | 1992年 / 103卷 / 03期
关键词：
D O I：
10.1016/0305-0491(92)90380-A
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. The effect of denervation on membrane-bound (Na+, K+)ATPase activity from the non-innervated (fraction P2) and innervated (fraction P3) membrane faces of Electrophorus electricus (L.) electrocyte is described. 2. After 20 days denervation both fractions presented a decreased (Na+, K+)Mg2+-dependent ATPase activity as compared with the normal electrocyte fractions. 3. When submitted to a discontinuous sucrose gradient, normal P2 membrane fraction exhibits a bimodal distribution of the enzyme which upon denervation changes to an unimodal distribution. P3 fraction showed a similar but less evident change of the enzyme distribution. 4. Sialic acid, which is described as a constituent of the enzyme beta-subunit, also showed a higher decrease (26.51%) in denervated P2 fraction as compared with P3 denervated membrane fraction (9%).
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收藏
页码：623 / 628
页数：6
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