1544
Site-directed mutagenesis of the wild-type IL-2R alpha kappa B enhancer ( GGGGAATCTCCC ) has revealed that the binding of p50 and p55 ( B2 complex ) is particularly sensitive to alteration of the 5' triplet of deoxyguanosine residues .
 protein: B2 complex; protein: p55; protein: p50; DNA: wild-type IL-2R alpha kappa B enhancer; DNA: 5' triplet
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: B2 complex; protein: p55; protein: p50; DNA: wild-type IL-2R alpha kappa B enhancer; DNA: 5' triplet