16711
The increase in nuclear Nrf2 levels was accompanied by a significant increase in heme oxygenase 1 ( HO - 1 ) and gamma - glutamylcysteine synthetase ( gamma GCS ) mRNA and protein levels .
 Chemical: gamma - glutamylcysteine
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: gamma - glutamylcysteine