21046
Exposure of mussels to Hg ( 2 + ) resulted in failure of redox homeostasis , as reflected on lipid peroxidation levels and superoxide dismutase activity in glands , and micronucleus frequency in gills .
 Chemical: Hg ( 2 + ); Chemical: superoxide
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 ( 2 + ); Chemical: superoxide