PROTEINS 



97 



C. Diamino-monocarboxylic acids 



NH. 



NH. 



13. Lysine 



14. Arginine 

 D. Cyclic compounds. 



15. Phenylalanine 



16. Tyrosine 



17. Tryptophane 



18. Histidine 



CH 2 CH 2 CH 2 CH 2 CHCOOH 



/NH 2 

 C = NH 

 \NH CH 2 CH 2 CH 2 CHNH 2 COOH 



H 

 C 

 HC/ \C CH 2 CHNH 2 COOH 



HC\/G 



C H 

 H 



H 



C 

 HC/ \C CH 2 CHNH 2 COOH 



HOC\/C 

 H 

 H 



H 

 C 

 HC/ \C C CH 2 CHNH 2 COOH 



:c\ 



HC\/C\/C 



C N II 

 H H 



H 



C N 



\ 

 ( 



C N 

 CH 2 

 CHNH 2 

 OOH 



CH 



