PHYSIOLOGICAL CHEMISTRY. 



the picrate which is sparingly soluble in water and crystallizes 

 readily. These crystals are shown in Fig. 27. 



FIG. 27. 





LYSINE PICRATE. 



Aspartic Acid, C 4 H 7 NO 4 . Aspartic acid is amino-succinic acid 

 and has the following structural formula: 



NH 2 



CH-COOH 



CH 2 -COOH. 



FIG. 28. 



ASPARTIC ACID. 



