28 THE CHEMICAL CONSTITUTION OF THE PROTEINS 



POLYPEPTIDES SYNTHESISED BY METHOD II. 



Dipeptides. 



Inactive. 



Glycyl-alanine. 

 Glycyl-phenylalanine. 

 Glycyl-leucine. 

 Glycyl-asparagine. 



Alanyl-glycine. 



Alanyl-alanine. 



Alanyl-leucine A. 



Alanyl-leucine B. 



Alanyl- phenylalanine. 



a-Aminobutyryl-glycine. 



a-Aminobutyryl-aminobutyric acid A. 



a-Aminobutyryl-aminobutyric acid B. 



Valyl-glycine. 



Valyl-alanine. 



Leucyl-glycine. 



Leucyl-alanine. 



Leucyl-leucine A. 



Leucyl-leucine B. 



Leucyl-phenylalanine a. 



Leucyl-phenylalanine 0. 



Leucyl-isoserine A. 



Leucyl-isoserine B. 



Leucyl-asparagine. 



Leucyl-aspartic acid. 



Leucyl-proline. 



Phenylglycyl-glycine. 



Phenylglycyl-alanine A. 



Phenylglycyl-alanine B. 



Phenylglycyl-asparagine. 



Phenylalanyl-glycine. 



Phenylalanyl-alanine. 



Phenylalanyl-leucine. 



Phenylalanyl-phenylalanine. 



Asparagyl-mono-glycine. 



Prolyl-alanine. 



Optically Active. 

 Glycyl-1-tyrosine. 

 Glycyl-d-alanine. 

 Glycyl-d-tryptophane. 

 Glycyl-1-phenylalanine. 

 Glycyl-3, 5-diiodo-l-t) rosine. 

 dl-Alanyl-d-alanine. 

 1-Alanyl-glycine. 

 d-AIanyl-d-alanine. 

 d-Alanyl-1-leucine. 

 d-Alanyl-d-tryptophane. 



1-Leucyl-l-tyrosine. 



1-Leucyl-glycine. 



1-Leucyl-d-alanine. 



1-Leucyl-l-leucine. 



d-Leucyl-1-leucine. 



d-Leucyl-d-leucine. 



1-Leucyl-d-leucine. 



d-Leucyl-1-asparagine. 



1-Leucyl-l-asparagine. 



1-Leucyl-d-tryptophane. 



1-Leucyl-d-glutamic acid. 



1-Phenylalanyl-glycine. 



Tripcptides. 



Diglycyl-glycine (chloracetylchloride + glycyl-glycine ester). 

 Alanyl-glycyl-glycine (a-bromopropionylbromide + glycyl-glycine ester). 

 Leucyl-glycyl-glycine (a-bromisocapronylchloride + glycyl-glycine ester or + glycine anhydride 



+ NaOH). 



Phenylalanyl-glycyl-glycine (phenyl-o-bromopropionylchloride + glycyl-glycine). 

 Leucyl-o-leucyl-phenylalanine (a-bromisocapronylchloride + a-leucyl-phenylalanine). 

 Leucyl-glycyl-phenylalanine (a-bromisocapronylchloride + glycyl-phenylalanine). 

 Diglycyl-phenylalanine (chloracetylchloride + glycyl-phenylalanine). 

 Diglycyl-cystine (chloracetylchloride + cystine). 



