8704
A theory to explain the striking propensity of the MBR breaks at three CpG clusters within the 175 - bp MBR region invoked activation - induced deaminase ( AID ) .
 Chemical: CpG
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: CpG