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RT - qPCR was used to quantify the transcription of genes encoding catalase ( cat ) , a cytosolic superoxide dismutase ( Cu / Zn - sod ) , a selenium - dependent glutathione peroxidase ( gpx ) , a glutathione reductase ( gred ) , the retinoid X receptor ( rxr ) , two heat shock proteins ( hsp40 and hsp70 ) , cortactin ( cor ) and the two ribosomal genes r18S and r28s .
 Chemical: superoxide; Chemical: Cu; Chemical: Zn; Chemical: selenium; Chemical: glutathione; Chemical: glutathione; Chemical: retinoid
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; Chemical: Cu; Chemical: Zn; Chemical: selenium; Chemical: glutathione; Chemical: glutathione; Chemical: retinoid