On "Racemized" Casein. 



107 



gen is split off, or if hydrogen is retained, we must have two protein 

 ions each having only a single latent valency capable of neutralizing 

 a unit charge as the following will indicate: 



H' H 



♦ \y 



= C(OH) — NH — + Na OH -» = CONa + N— . 



I 



OH 



Such a case has not as yet been shown, though the possibility 

 may exist. It is also possible that a change other than the ketol- 

 enol tautomerism takes place. 



