A Ca2+/H+ Antiport System Driven by the Proton Electrochemical Gradient of a Tonoplast H+-ATPase from Oat Roots
- 1 December 1985
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 79 (4) , 1111-1117
- https://doi.org/10.1104/pp.79.4.1111
Abstract
Two types of ATP-dependent calcium (Ca2+) transport systems were detected in sealed microsomal vesicles from oat roots. Approximately 80% of the total Ca2+ uptake was associated with vesicles of 1.11 grams per cubic centimeter and was insensitive to vanadate or azide, but inhibited by NO3−. The remaining 20% was vanadate-sensitive and mostly associated with the endoplasmic reticulum, as the transport activity comigrated with an endoplasmic reticulum marker (antimycin A-insensitive NADH cytochrome c reductase), which was shifted from 1.11 to 1.20 grams per cubic centimeter by Mg2+.This publication has 26 references indexed in Scilit:
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