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The 1311-base pair human tumor necrosis factor (TNF) alpha promoter region was fused to the luciferase (Luc) reporter gene and studied in a transient transfection system in three TNF producing cell lines , the U937 macrophage cell line , the MLA 144 T cell line , and the 729-6 B cell line .
 cell line: 729-6 B cell line; cell line: TNF producing cell lines; cell line: MLA 144 T cell line; DNA: luciferase (Luc) reporter gene; cell line: U937 macrophage cell line; DNA: 1311-base pair human tumor necrosis factor (TNF) alpha promoter region
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: 729-6 B cell line; cell line: TNF producing cell lines; cell line: MLA 144 T cell line; DNA: luciferase (Luc) reporter gene; cell line: U937 macrophage cell line; DNA: 1311-base pair human tumor necrosis factor (TNF) alpha promoter region