Ionic Relations of Cells of Chara Australis II. The Indiffusible Anions of the Cell Wall

Abstract

Studies of isolated cell walls from Ohara australi8 have been extended to measure the concentration of the endogenous anions of the wall and the pK of the acids which ionize to give these anions. The conce'ntration of in diffusible anions in the wall is O· 8 equiv/l when the external concentration of cations is 20 mN but may be higher when it is greater than this. The mean pK of the acids from which the wall anions are derived is 2· 2.