DISCUSSION 89 



Kandutsch : The lipid that is attached to this material is obviously very- 

 labile to auto-oxidation in air, and I am sure that periodate would 

 oxidize it also. As far as I know, however, this auto-oxidation of the 

 lipid has not appeared to influence the activity of the preparations very 

 much, but then I don't have a very quantitative test, and perhaps I 

 could miss a sizeable change. 



