16625
The IC50 values obtained by dose - response curves of H2O2 inhibition were 0 . 17mM for the wild - type , 0 . 39mM for the four replacement mutant containing C136 and C155 , 2 . 23 or 1 . 8mM in the five replacement mutants containing the single C136 or C155 , respectively .
 Chemical: H2O2
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: H2O2