[Some properties of preparations of Na+ and k+-ATPase treated with deoxycholate].

The treatment of membrane suspension from the guinea pig kidney cortex possessing Na+, + K+ -ATPase activity with 0.20% sodium deoxycholate (DOX : protein equals 12 : 1) leads to lowering of their enzymatic activity. DOX-treated preparation can be divided into two fractions by centrigugation (1 hr - 22 000 g). The pellet has 1.5-fold higher enzymatic activity than the initial preparation and cannot be activated by small amounts of histones. The supernatant has 2-fold lower enzymatic activity than the initial preparation but in presence of small amounts of histones this activity rises to the level of the initial preparation activity. The action of DOX treatment on the membrane structure of Na+ + K+ -ATPase preparations is discussed.