34 THE CHEMICAL CONSTITUTION OF THE PROTEINS 



POLYPEPTIDES SYNTHESISED BY METHOD III. 



Dipeptides. 



Benzoylglycyl-glycine (hippuryl chloride + glycine ester). 

 d-Alanyl-glycine (d-alanyl chloride + glycine ester). 

 d-Alanyl-d-alanine (d-alanyl chloride + d-alanine ester). 

 dl-Valyl-glycine. 

 Valyl-alanine A. 



1-Leucyl-glycine (1-leucyl chloride + glycine ester). 

 1-Leucyl-d-alanine (1-leucyl chloride + d-alanine ester). 

 1-Leucyl-l-leucine (1-leucyl chloride + 1-leucine ester). 

 d-Tryptophyl-glycine (d-tryptophyl chloride + glycine ester). 



Tripeptides, 



Benzoyl-diglycyl-glycine (benzoyl-glycyl-glycyl chloride + glycine ester). 

 Leucyl-glycyl-glycine (leucyl-glycyl chloride + glycine ester). 

 Leucyl-glycyl-leucine (leucyl-glycyl chloride + leucine ester). 

 Glycyl-1-asparagyl-l-leucine (chloracetyl-l-asparagyl chloride + 1-leucine ester). 



Tetrapep tides. 

 Leucyl-diglycyl-glycine (bromisocapronyl-glycyl-glycyl chloride + glycine ester). 



,, ,, ,, (bromisocapronyl-glycyl chloride + glycyl-glycine ester). 



,, ,, ,, (leucyl-diglycyl chloride + glycine ester). 



Glycyl-d-alanyl-glycyl-1-tyrosine (chloracetyl-d-alanyl-glycyl chloride + 1-tyrosine ester). 



Pentapeptide. 

 Leucyl-triglycyl-glycine (o-bromisocapronyl-diglycyl-glycyl chloride + glycine ester). 



Hexapeptide. 

 Leucyl-tetraglycyl-glycine (a-bromisocapronyl-diglycyl-glycyl chloride + glycyl-glycine). 



Heptapeptide. 

 Leucyl-pentaglycyl-glycine (o-bromisocapronyl-diglycyl-glycyl chloride + diglycyl-glycine). 



Octapeptide. 

 Leucyl-hexaglycyl-glycine (a-bromisocapronyl-diglycyl-glycyl chloride + triglycyl-glycine). 



Decapeptide. 

 Leucyl-octaglycyl-glycine (a-bromisocapronyl-diglycyl-glycyl chloride + pentaglycyl-glycine). 



Dodecapeptide* 



Leucyl-decaglycyl- glycine (bromisocapronyl-tetraglycyl-glycyl chloride + pentaglycyl- 

 glycine). 



Tetradecapeptide. 



Leucyl-triglycyl-leucyl-octaglycyl-glycine (bromisocapronyl-diglycyl-glycyl chloride + 1- 

 leucyl-octaglycyl-glycine) . 



/? Qctadecapeptide. 



L eucy 1- tr i glycy 1-leucyl- triglycyl^o'ciaiglycyl- gly ci ne (bromisocapronyl-diglycyl-glycyl chlor- 

 ide + leucyl-triglycyl-leucyl-octaglycyl-glycine). 



