170 



PAPAIN-PROTEOL YSIS. 



In the control mixture, in which the papain had been boiled 

 before mixing it with the albumin, 72 hours at 40C. resulted 

 simply in the formation of 0.03 gram of neutralization precipi- 

 tate and a trace only of albumose. The undissolved residue 

 when dried weighed 6.9301 grams, the plus weight being due 

 to the insoluble matter of the papain. The slight corrections 

 made necessary by these data have been embodied in the above 

 figures. 



The percentage results, calculated on the dry proteid used, 

 are as follows : 



Here, for some reason, the formation of peptone was com- 

 paratively slight. Although the amount of papain employed 

 in each mixture was less than the quantity used in the first 

 series of experiments, the ratio of papain to dry proteid was 

 much the same in the two cases. Evidently, the papain made 

 use of in this last experiment was far less active than the pre- 

 ceding preparation, as shown also by the large percentage of 

 undissolved residue. To be sure, considerable albumose was 



