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Alternatively , or additionally , species differences may be the result of different sensitivities of the genes associated with the peroxisome proliferation response to low levels of PPs , owing to structural differences in PPARalpha [ 54 ] .
 Anatomy: peroxisome
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Anatomy: peroxisome