
doi: 10.1242/jeb.2.3.389
ABSTRACT The starfish (Asterias forbesii) egg is unusual in that it is very resistant to cytolysis by Quillaja saponin but possesses little resistance to hypotonic solutions (Page and Clowes1). Inasmuch as the point of attack of saponin and hypotonic solutions is quite unknown, the fact that the effect of hypotonic solutions is related to the fixing action of saponin in different kinds of protoplasm becomes of much interest. Such a selective increase in resistance to hypotonic solutions is conferred by saponin as the following experiments demonstrate.
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