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The cytosolic glutathione S - transferases ( GSTs , EC 2 . 5 . 1 . 18 ) are a superfamily of dimeric isoenzymes which catalyze the conjugation of electrophilic substrates with glutathione .
 glutathione S - transferases, GSTs, EC 2 . 5 . 1 . 18
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 glutathione S - transferases, GSTs, EC 2 . 5 . 1 . 18