1553
It was hypothesized that because Hg accumulates in the proximal tubules ( PTs ) , glutathione - S - transferases ( GST ) - alpha ( suggestive of kidney damage at the level of PT ) would be expected to be more related to Hg exposure than GST - pi ( suggestive of kidney damage at the level of the distal tubules ) .
 Chemical: Hg; Chemical: glutathione; Chemical: S; Chemical: Hg
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: Hg; Chemical: glutathione; Chemical: S; Chemical: Hg