4937
In addition , several genes involved in the metabolism of xenobiotics ( e . g . , glutathione S - transferase , sulfotransferase , cytochrome P450 ) were also found to be significantly affected by IBU exposure .
 Chemical: glutathione; Chemical: S; Chemical: IBU
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: S; Chemical: IBU