30467
Under control conditions , the AEA of biofilms were found to change throughout time with a significant increase in ascorbate peroxidase ( APX ) activity during the exponential growth and a more important role of catalase ( CAT ) and glutathione reductase ( GR ) activities during the slow growth phase .
 ascorbate, glutathione
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ascorbate, glutathione