1723
In the present study , differentiated human intestinal Caco - 2 cells were used as a model for the human small intestine to investigate the detoxification of BPDE and excretion of stereoisomeric glutathione conjugates in the presence of an inhibitor of the glutathione - cleaving enzyme gamma - glutamyl transpeptidase at the cell surface .
 Chemical: BPDE; Chemical: glutathione; Chemical: glutathione
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: BPDE; Chemical: glutathione; Chemical: glutathione