1021
To address this question , we used the proteomic approach of tandem affinity purification to identify cellular proteins that are in complex with E7 , and identified the 600 - kDa protein , p600 , as a binding partner of E7 .
 Anatomy: cellular
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: cellular