318 E. ROBERTS AND D. G. SIMONSEN 
high intracellular concentrations of these constituents in relatively constant pro- 
portions can be resistant to the action of at least some severely cytotoxic agents. 
ee 
181 182 
te ; 
19 
185 : 186 
@ is7 188 
Figs. 181-188. Effect of podophyllin on free amino acid distribution in Yoshida sarcoma cells. 
Control cells (75 wl) and fluid (150 wl) (Figs. 181, 182) and at 30 (Figs. 183, 184), 45 (Figs. 185, 
186), and 60 min (Figs. 187, 188) after injection of podophyllin. Taurine, 5; glutamic acid, Eis 
aspartic acid, 18; and ethanolamine phosphate, 109. 
References p. 348/349 
