204 E. ROBERTS AND D. G. SIMONSEN 
31 32 

37 38 

Figs. 31-38. Paper chromatograms of extracts obtained from 37.5 mg of original fresh weight of 
rat brain at various times of sterile autolysis. Fig. 31: control. Fig. 32: 4 h. Fig. 33: 8h. Fig. 34: 
12h. Fig. 35: 24h. Fig. 36: 48h. Fig. 37: 72h. Fig. 38: 96h. Glutamine, 13; y-aminobutyric 
acid 22. 
References p. 348/349 
