909
We next demonstrated in coimmunoprecipitates that VHL and Sp1 were part of the same complex and , by using a glutathione - S - transferase - VHL fusion protein and purified Sp1 , that VHL and Sp1 directly interact .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
Answer:
 None