9512
In this study , we developed a simple and robust Venus - based BiFC system to screen for modulators of p53 - p53 and p53 - Mdm2 interactions in live mammalian cells .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None