6573
Irradiation induced significant changes in the secondary and tertiary structures of Ara h 6 , and the antigenicity of both purified Ara h 6 and WPPE were reduced upon increasing the irradiation doses .
 None
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