11869
The binding site of 8a was mapped to TP - 1 of NS5B by counter screening against P495L NS5B mutant , employed as a screen for TP - 1 site binders .
 None
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