6571
Peanut allergen Ara h 6 was isolated and irradiated at 1 , 3 , 5 , or 10 kGy , and a whole peanut protein extract ( WPPE ) was also treated by irradiation .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None