8 



I. XAGAI : 



laccase Solution' which gave the direct oxidase reaction by phenj-lendiamine, 

 alpha naphtol, and guaiacuni were added to fifty cc of the anthocyanin exti-act 

 which was prejjared from the diied powder of the flower of Lilium tif/rinum 

 by exti'action with dilute alcohol. The mixtiire was kept at the room 

 temperature which varied from 19.0 to 20.0 C. 



Table 2. 



Decolorization o£ imtbooynidn by laccase. 



T.\BLE 3. 



Same as Table 2, except the concentration of the enzyme which was 

 retluceil to half that of the former. 



It was found that certain salts and the sugju-s retarded the a«ti\'ity of 

 the enzyme. One of the experiments gave the following result. Fifty cc of a 

 weak alcohohc (25 per cent) extract of anthocyanin from the violet coloiu-ed 

 perigone of Iris Kcemp/eri to M-liich Avas added glucose (Merck's pure) to 



1. The material was IdniUy fumishcil to the writer by Trof. K. Shibata. 



