794
It also bound to the purine-rich CD3R element from the human immunodeficiency virus type 2 long terminal repeat , which is required for inducible virus expression in response to signalling through the T-cell receptor .
 DNA: human immunodeficiency virus type 2 long terminal repeat; DNA: purine-rich CD3R element; protein: T-cell receptor
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: human immunodeficiency virus type 2 long terminal repeat; DNA: purine-rich CD3R element; protein: T-cell receptor