PRODUCTS OF DECOMPOSITION 



8. Serin: C3H7NO3, or /S-hydroxy-a-aminopropionic acid: 



CH2(OH).CH(NH2)COOH. 



9. Cystin: C6H12N2O4S2 or dicystein, or di-(/3-thio-a-aminopropionic 



acid) : 

 HOOC.CH(NH2).CH2.S - S.CH2.CH(NH2).COOH 



B. Monoaminodicarboxylic Acids 



10. Aspartic acid, C4H7NO4, or aminosucckiic acid. 



HOOC.CH2.CH(NH2).COOH. 



11. Glutamic acid, C6H9NO4, or a-aminoglutaric acid: 



HOOC.CH2.CH2.CH(NH2)COOH. 



C. Diaminomonocarboxylic Acids 



12. Arginin, C6Hi4N402, or a-amino-S-guanidin valerianic acid: 

 / 



NH2 



HN = C 



\ NH.CH2.CH2.CH2.CH(NH2)COOH. 



13. Lysin: C6H14N2O2 or a-e-diaminocaproic acid: 



H2N.CH2.CH2.CH2.CH2.CH(NH2).COOH. 



D. Diamino-oxy-monocarboxylic Acids 



14. Caseinic acid, or diaminotrioxydodecanic acid: 



C12H26N2O5. 



E. Heterocyclic Compounds 



15. Histidin, C6H9N302, or /3-iminazolyl-a-aminopropionic acid: 



CH 



^ \ 



N NH 



I I 



CH = C.CH2.CH(NH2).COOH 



16. Prolin, C6H9NO2, or a-pyrrolidin carboxylic acid: 



CH2 — CH2 



I I 



CH2 CH.COOH 



\/ 

 NH 



17. Oxyprolin, or oxypyrrolidin carboxylic acid: 



C6H9NO3. 



18. Tryptophane, C11H12N2O2, or /3-indole-a-aminopropionic acid: 



C.CH2.CH.NH2.COOH 



C6H4 CH 



\/ 

 NH 



