X, A, 1 



Pratt: Papain 



13 



manner, and the juice was collected in porcelain evaporating 

 dishes. The entire collection, amounting to approximately 0.5 

 kilogram, was thoroughly mixed to insure uniform composi- 

 tion, using a bone spatula, and was divided into various portions 



W 



Per cent protein discsted. 



30 40 50 60 



80 



Fig. 1. Curve 1. Papain from local drug store. Curce 3. Ceylon papain, sample 3. Curve ■',. 

 Ceylon papain, sample 4. Curve 5. Ceylon papain, sample 5. Curve 6. Ceylon papain, 

 sample 6. Curve 7. Ceylon papain, sample 7. Curve 8. Mexican papain, sample 8. Curve 

 9. West Indian papain, sample 9. Curve W. Fresh papaya latex, sample 10. Curve n. 

 Papain by alcohol precipitation, sample 12. 



which were treated in different ways. The activity of the 

 original latex designated No. 10 was obtained by analysis in 

 the above manner, the weight of latex used being computed 

 to dry papain. The results of the analysis are shown in 

 Table XII. 



