F. SANGER 



peptide Bp3, since all the requisite amino acids are present. 

 Serine, which is found only in sequence 5, is also present in Bp3 ; 

 whereas amino acids characteristic of the other three sequences 



I5r 



10 



2 



o 



ir 

 o 



o 



a: 



bJ 



o 



z 



^ 



(n 



o 



10 



PEPTIDES 



CZ) Vol. Glu. 



CZ^ Vol. Glu. Ala. 



CD 



CD 



Val.Glu.Ala.Leu. 



Leu.Val.CySO3H.6ly. Glu.Arg.Gly.Phe. 

 Tyr. Leu.Val.CySO3H.Gly.Glu.Arg.Gly.Phe. 



v^ J Mixture of neutral peptides 



C "~y His. Leu. CyS03H. Gly. Ser. His. Leu. 



CD 



NH2 NH2 



Phe. Vol. Asp. Glu. His.Leu.CySO3H.Gly. SerHis.Leu. 



(Bp3) 



CD 



Tyr. Thr Pro. Lys. Ala. 



Fig. 1. lonophoresis of peptic hydrolyzate of fraction B at 

 pU 6.4 and 1000 v. (3 hours). 



444 



