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The infection of a variety of cultured and primary lymphoid cells with a recombinant retrovirus containing a histone promoter-driven beta-galactosidase gene is shown to result in the expression of beta-galactosidase in 50% to 100% of the cells.
 DNA: histone promoter-driven beta-galactosidase gene; protein: histone promoter-driven beta-galactosidase; cell type: primary lymphoid cells; protein: beta-galactosidase
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: histone promoter-driven beta-galactosidase gene; protein: histone promoter-driven beta-galactosidase; cell type: primary lymphoid cells; protein: beta-galactosidase