19401
The transpeptidation activity of bovine kidney GGT was measured with glycylglycine as the acceptor substrate and several glutathione conjugate donor substrates , representative of detoxication products of polycyclic aromatic xenobiotics .
 Chemical: glycylglycine; 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: glycylglycine; Chemical: glutathione