10481
M247 appears to be unimportant , but 2 - aminopurine fluorescence measurements show that Y261 plays a role in primer - template strand separation .
 Chemical: 2 - aminopurine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: 2 - aminopurine