7916
Human nuclear uracil - DNA glycosylase UNG2 is essential for post - replicative repair of uracil in DNA , and UNG2 protein and mRNA levels rapidly decline in G2 / M phase .
 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: uracil; Chemical: uracil