16746
Further investigation revealed that reduction of Rad9 reduced the UV - induced transcription of the genes of the nucleotide excision repair factors DDB2 , XPC , DDB1 and XPB and DDB2 protein levels in human cells .
 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