4932
Clams were exposed for 1 , 3 , 5 and 7 days to 0 , 100 and 1000 mu gIBU / L , and established biomarker responses ( haemolymph lysozyme , gill acetylcholinesterase and digestive gland superoxide dismutase activities ) as well as digestive gland transcriptome were evaluated .
 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: superoxide