15213
2 ' , 4 ' - BNA / LNA aptamers of groups V and VI bound human thrombin with K ( d ) values in the range of several 10 nanomolar levels .
 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