DAVID PRESSMAN 



Fig. Ic 



glycine-leucine, which contains 1 glycinate residue and 1 leucinate residue 

 (1932). 



o- 



C— NHCHoC 



\ 







— NN' 



o- 



C— NH— CHC 



O 



\ 



O 



H.C- 



/ 

 CH— CH, 



Among the antibodies formed, there could be found antibodies with speci- 

 licities directed against either one or the other of the two groups as well as 



