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The E2A-HLF (for hepatic leukaemia factor) fusion gene , formed by action of the t(17;19) (q22;p13) chromosomal translocation , drives the leukaemic transformation of early B-cell precursors , but the mechanism of this activity remains unknown.
 t(17;19) (q22;p13), B-cell precursors, E2A-HLF, E2A-HLF (for hepatic leukaemia factor) fusion gene
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 t(17;19) (q22;p13), B-cell precursors, E2A-HLF, E2A-HLF (for hepatic leukaemia factor) fusion gene