Abstract
The calcium permeability of the sarcoplasmic vesicles is greatly increased when vesicular suspensions are extracted with ether. A 7–8% v/v aqueous ether solution abolishes the calcium concentrating ability of the vesicles completely. The calcium remaining in the solution permanently activates the calcium magnesium dependent ATPase. In parallel to the change of the permeability of the vesicular membranes membranal lipids are removed by the ether treatment. Concentrations of ether which produce a maximal permeability increase only extract cholesterol esters. Higher concentrations of ether which inhibit the transport ATPase remove neutral lipids and phospholipids. The basic ATPase is not affected.

This publication has 9 references indexed in Scilit: