CH. II.] 



PROTEOSES AND PEPTONES. 



53 



in the digestion of fibrin by pepsin and 0-2 per cent, 

 hydrochloric acid : 



Fibrin 



Soluble Globulin 



I 

 Metaprotein 



Primary albumoses 



Proto-albumose : Hetero-albumose. 



Secondary albumoses 



Thio-albumose : Synalbumose, etc. 



Peptones. 



The following scheme shews the method adopted for 

 the isolation of certain of the albumoses : 



Neutral Witte's peptone, treated with equal volume of 

 saturated ammonium sulphate solution. 



The primary albumoses are soluble in water, dilute 

 acids, alkalies and salt solutions. Their solutions are not 

 coagulated on heating. They are precipitated by half- 

 saturation with ammonium sulphate. They give a pre- 



