32¢ E. ROBERTS AND D. G. SIMONSEN 
content, there were marked increases in the levels of all of the detectable constituents 
at 24h after estradiol injection. Unfortunately, data for uteri of normal rats were 
not included. However, since the highest level of amino acid content was observed 
at a time when the dry weight had attained the maximal level, it is unlikely that 

Figs. 239-246. Free amino acids of cells (75 yl) and fluid (150 yl) of the ascites form of the Murphy 
lymphosarcoma at different times after implantation into rats. Figs. 239, 241, 243, 245: chromatog- 
rams of extracts of cells. Figs. 240, 242, 244, 246: corresponding chromatograms of extracts of 
ascites fluid obtained at 2, 3, 4 and 8 days, respectively, after transplantation. Glutamine, 13; 
glutamic acid, 17. 
References p. 348/349 
