698
Third, only the 50 kD protein was retained on a biotinylated DNA-streptavidin matrix when the DNA fragment contained the TRE -DNA .
 DNA: TRE; protein: 50 kD protein; DNA: TRE -DNA
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:
 DNA: TRE; protein: 50 kD protein; DNA: TRE -DNA