1737
VDR DNA-binding mutants were unable to either bind to this element in vitro or repress in vivo; the VDR DNA-binding domain alone, however, bound the element but also could not repress IL-2 expression .
 protein: VDR DNA-binding mutants; protein: VDR; protein: IL-2; protein: VDR; protein: VDR DNA-binding domain
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: VDR DNA-binding mutants; protein: VDR; protein: IL-2; protein: VDR; protein: VDR DNA-binding domain