12098
Seven new sites were discovered , including the Incoming Nucleotide Binding , Knuckles , NNRTI Adjacent , and 399 sites , located in the polymerase region of RT , and the 428 , RNase H Primer Grip Adjacent , and 507 sites , located in the RNase H region .
 Chemical: Nucleotide
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: Nucleotide