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To study the transcription factor requirement in B-cells , different U2 enhancer constructions were transfected into the lymphoid cell line , BJA-B .
 cell line: lymphoid cell line; protein: transcription factor; DNA: U2 enhancer constructions; cell line: BJA-B; cell type: B-cells
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:
 cell line: lymphoid cell line; protein: transcription factor; DNA: U2 enhancer constructions; cell line: BJA-B; cell type: B-cells