28781
Among antioxidant defences , catalase and glutathione peroxidases did not exhibit variations in enzymatic activity , while the corresponding gene transcriptions were up - and down - regulated , respectively ; unchanged mRNA levels of superoxide dismutase confirmed the non - synchronous pathways of variations for such antioxidants .
 Chemical: glutathione; Chemical: superoxide
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: glutathione, superoxide 
Answer:
 Chemical: glutathione; Chemical: superoxide