A Factor influencing the Intracellular Exposure of Sulphydryl Groups

Abstract

IN the course of some experiments involving the addition of solutions of sulphydryl inhibitors to cultures of Paramecium bursaria, it was noticed that a wide range of response was obtained from concentrations just below a lethal level. Further examination has shown that the period of survival of any one culture when exposed to a given concentration of a sulphydryl inhibitor is dependent upon the illumination of the culture, both immediately before and during the experiment.