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Transfection experiments with c-myc promoter constructs in both DHL-9 and Raji cells revealed that the PuF site functioned as a positive regulatory element in B cells with a drop in activity with mutation of this site.
 DNA: c-myc promoter constructs; cell type: B cells; DNA: positive regulatory element; DNA: PuF site; cell line: Raji cells; DNA: c-myc promoter; cell line: DHL-9
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: c-myc promoter constructs, B cells, positive regulatory element, PuF site, Raji cells, c-myc promoter, DHL-9 
Answer:
 DNA: c-myc promoter constructs; cell type: B cells; DNA: positive regulatory element; DNA: PuF site; cell line: Raji cells; DNA: c-myc promoter; cell line: DHL-9