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Protection assays using FC131 prior to MTSEA treatment significantly reduced the alkylation of all MTSEA - sensitive mutants .
 Chemical: FC131; Chemical: MTSEA; Chemical: MTSEA
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: FC131; Chemical: MTSEA; Chemical: MTSEA