10478
This publication uses both steady - state and time - resolved 2 - aminopurine fluorescence to show pronounced unwinding of primer - templates with Pyrococcus furiosus ( Pfu ) polymerase - DNA complexes containing uracil at + 2 ; much less strand separation is seen with uracil at + 4 .
 Chemical: 2 - aminopurine; Chemical: uracil; Chemical: uracil
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; Chemical: uracil; Chemical: uracil