March, U17.3 NAG AL— THE ACTION OF OXIDASE ON ANTHOCYANIN. 



71 



The specific activity of the oxidase of Armillaria on the 

 chrysanthemum anthocyanin can be observed by the data given 

 in the following table. 



100 



Fig. 1. Curve showing the velocity of decomposition of anthocyanin 

 by hydrogen peroxide. Abscissae time in minutes; ordinates, concent- 

 ration of anthocyanin (intensity of colour). 



Table IV. 



strength of enzyme 

 olution. 



time required for com- 

 plete decolourization 



(min.). 



mean rate.* 



s| Kt-ific activity.! 



1 



'/2 



V. 



V- 

 (1 



75 



oo 



105 

 165 



/ 



1.:;:; 



11 1 



.96 



.<;i 



.01:; 



.022 

 .038 



.048 



* Reciprocal of tin.eX 10D0. 



i Rfean rate/cone, of enzyme. 



When the plant juice and hydrogen peroxide are mixed 

 together with anthocyanin the time required for a complete 



