28189
In intracellular tyrosinase assays , the enzyme ' s activity was reduced about 19 % with extract concentrations ranging 0 . 1 - 10 micro g / mL .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None