11753
Of its gene products , E6 binds to and inactivates p53 tumor suppressor protein by ubiquitin / proteasome - dependent degradation .
 E6, p53 tumor suppressor protein, ubiquitin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 E6, p53 tumor suppressor protein, ubiquitin