We studied the possible use of the detergent Brij 58 in physiological experiments for the reorientation of right-side-out plasmalemmal vesicles, which were isolated from wheat (Triticum aestivum L.) coleoptiles. The activities of K+, Mg2+-ATPase and the ATP-dependent H+-potential were higher in Brij 58-treated vesicles, whereas membrane permeability for K+ and Na+ remained unchanged. Brij 58 did not suppress the ATP-dependent IAA transport into vesicles and RNA polymerase II activation by IAA–protein plasmalemmal complexes in the system of isolated nuclei. The conclusion was that, using Brij 58, we could obtain the plasmalemmal fraction, which consisted almost completely of closed inverted vesicles. These vesicles can be applied for the in vitro study of the processes, which occur on the cytosolic plasmalemmal surface.
Russian Journal of Plant Physiology – Springer Journals
Published: Oct 13, 2004
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