52 



THE TROTEINS OF THE WHEAT KERNEL. 



These six preparations were all dried at i io and analyzed with the results 

 shown in table n. 



Table ii. Composition of nuclein from the proteins of the wheat embryo. 



Carbon 



Hydrogen.. . 

 Nitrogen.. . . 



Sulphur 



Phosphorus . 



Ash 



P 2 5 in ash. . 

 Bases in ash. 



These analyses of nuclein were calculated free from the bases of the ash 

 and from nucleic acid, in the way previously described, with the results given 

 in table 12. 



Table 12. Composition of protein matter contained in the nuclein. 



Carbon . . . 

 Hydrogen 

 Nitrogen. . 

 Sulphur.. . 

 Oxygen. . . 



The composition of the protein matter in 54 and 55 is very nearly that of 

 leucosin, except as regards sulphur, the amount of which is decidedly greater. 

 On the other hand, 52 and 53, which also were derived from preparations 

 whose protein matter was leucosin, differ in composition very decidedly from 

 that substance. This is probably because on pepsin digestion the substance 

 of preparations 54 and 55 remained throughout undissolved, whereas 52 and 

 53 separated on pepsin digestion from nearly clear solutions, and therefore 

 doubtless their protein matter had been to some degree altered by the pepsin 

 before separating as an insoluble compound with nucleic acid. The two 

 nucleins, 56 and 57, from the globulin, which also had separated from 

 solution, show similar differences in composition when compared with the 

 unaltered globulin, carbon and nitrogen being higher and sulphur very much 

 higher than in the globulin. 



