21896
Activity of glutathione peroxidase and reductase ( GR ) increased in experimental groups exposed to atrazine at 0 . 3 ( only for GR activity ) and 90 mu gL ( - 1 ) compared to control .
 Chemical: glutathione; Chemical: atrazine
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: glutathione; Chemical: atrazine