222 



BIOLOGY OF SPECIALIZED GROUPS 



i. Glycocoll 



2 - Leudn I Simple amino acids of the 



3- Alanin fatty acid series 



4. Amino- valerianic acid. 



5. Aspartic acid j Dibasic acids closely related 



6. Glutaminic acid / to monat omic acids 



7. Phenylalanin i 



8 Tvrosin 1 Aromatic constituents of the 



9. Tryptophan J P roteid molecule 



10. a-pyrrolidin carboxylic acid (prolin) 



Probably from some other 



amino acid by rearrange- 

 n. Oxy-a-pyrrolidm carboxylic acid 



.. N ment 



(oxy-prolm) 



12. Serin Together with 10, n, 



bring protein in close re- 

 lation to carbohydrates 



13. Lysin <\ 



14. Arginin [ Hexone bases 



15. HistidinJ 



16. Cystin Sulphur exists in this form 



It will be noted that the simple amino acids of the fatty 

 acid series are glycocoll, leucin, alanin, and amino-valerianic 

 acid. These acids are characterized by the presence of an 

 NH 2 group attached to the carbon atom in the alpha position. 

 The common formula is R-CHNH-rCOOH. On putrefaction 

 these substances produce many compounds. The various fatty 

 acids can be easily derived from them on the splitting off of 

 the NH 2 group. Glycocoll on splitting produces acetic acid, 

 and alanin on splitting produces propionic acid. Wells states 

 that in all probability acetic and butyric acid are most com- 

 monly produced in this way. In the process of the putre- 



