H. ECKW£ILER, H. M. NOYES, AND K. G. FALK 



297 



1 £ J •+ 5 6 7 



S lo U 12. 13 pH 



Fig. 2. Titration curve of glycine. Practically identical with titration curves 

 of alanine, a-amino-butyric acid, and leucine. 



