29062
Moreover , the drug interferes with binding of the 19S cap essential for processing of polyubiquitinylated substrates , and the PA200 activator to the 20S catalytic core proteasome .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None