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Although TAL1 expression has not been observed in normal lymphocytes , TAL1 gene products are readily detected in leukemic cells that harbor a rearranged TAL1 allele .
 ( protein: TAL1, None) , ( cell type: normal lymphocytes, None) , ( protein: TAL1 gene products, None) , ( DNA: TAL1 gene, None) , ( DNA: rearranged TAL1 allele, None) , ( cell type: leukemic cells, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( protein: TAL1, None) , ( cell type: normal lymphocytes, None) , ( protein: TAL1 gene products, None) , ( DNA: TAL1 gene, None) , ( DNA: rearranged TAL1 allele, None) , ( cell type: leukemic cells, None) 