819
Mutations in this DNA-binding site abolished binding of a nuclear factor in human B cell nuclear extract and decreased the activity of the DR alpha promoter to a basal level .
 protein: nuclear factor; DNA: DNA-binding site; DNA: DR alpha promoter
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: nuclear factor, DNA-binding site, DR alpha promoter 
Answer:
 protein: nuclear factor; DNA: DNA-binding site; DNA: DR alpha promoter