688
Thus, TAL1 activation in these patients may result from subtle alterations in cis-acting regulatory sequences (affecting expression of a single TAL1 allele ) or changes in trans-acting factors that control TAL1 transcription (affecting expression of both TAL1 alleles ).
 ( DNA: TAL1 alleles, None) , ( protein: TAL1, None) , ( DNA: cis-acting regulatory sequences, None) , ( protein: TAL1, None) , ( protein: TAL1, None) , ( protein: TAL1, None) , ( DNA: single TAL1 allele, 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:
 ( DNA: TAL1 alleles, None) , ( protein: TAL1, None) , ( DNA: cis-acting regulatory sequences, None) , ( protein: TAL1, None) , ( protein: TAL1, None) , ( protein: TAL1, None) , ( DNA: single TAL1 allele, None) 