78 



PHYSIOLOGICAL CHEMISTRY 



C. Diamino-monocarboxylie acids 



NH 2 NH 



CH 



13. Lysine 



14. Arginine 



D. Cyclic compounds. 



15. Phenylalanine 



2 CH 2 CH,CH 2 CH COOH 



/NH 2 

 C = NH 

 \NH CH 2 CH 2 CH 2 CHNH 2 COOH 



H 

 C 



HC/ \C CH,CHNH 2 COOH 



16. Tyrosine 



17. Tryptophane 



18. Histidine 



HC\/C 

 C H 

 H 



H 

 C 

 HC/ \C CH 2 CHNH 2 COOH 



C 



C H 

 H 



H 

 C 

 HC/ \C C CH 2 CHNH 2 COOH 



HC\/C\/C 

 C N H 

 H H 



H 



C N 



\ 



C-/ 



CH 2 



CHNH 2 



COOH 



CH 



