96 



PHYSIOLOGICAL CHEMISTRY 



5. Caprine 



6. Leucine 



7. Isoleucine 



8. Serine 



9. Cy stein 

 10. Cystin 



CH 3 CH 2 CH 2 CH 2 CHNH 2 COOH 

 CH 



\ 



CH CH,CHNH 9 COOH 



CH, 



CH Q CH, 



\ 



( 



/ 



CH CHNH,COOH 



CH 3 

 CH 2 OH 



CHNH 2 



COOH 

 CH 2 SH 



CHNH 2 



COOH 



CH 2 S S CH 2 



CHNH 2 CHNH 2 

 COOH COOH 



B. Monoamino dicarboxylic acids. 



11. COOH 12. COOH 



CH 2 

 CHNH 2 



COOH 



Aspartic 



CH 2 

 CH 2 

 CHNH 2 



COOH 



Glutamic 



