3233
Previous studies indicate that the regions , where the ACHE ( 7q22 ) and BCHE ( 3q26 . 1 - q26 . 2 ) genes are localized , are suffering such structural modifications in breast cancer .
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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