14089
In particular, naturally occurring sequence variation impacted transcription factor binding to an activating transcription factor/ cAMP response element binding ( ATF/CREB ) binding site (located between the LEF-1 and distal NF-kappaB transcription factor binding sites ) that we identified in previous studies of the HIV-1 LTR .
 ( protein: ATF/CREB, None) , ( DNA: LTR, None) , ( protein: LEF-1, None) , ( protein: activating transcription factor/ cAMP response element binding, None) , ( DNA: HIV-1 LTR, None) , ( protein: transcription factor, None) , ( DNA: activating transcription factor/ cAMP response element binding ( ATF/CREB ) binding site, None) , ( protein: NF-kappaB, 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: ATF/CREB, None) , ( DNA: LTR, None) , ( protein: LEF-1, None) , ( protein: activating transcription factor/ cAMP response element binding, None) , ( DNA: HIV-1 LTR, None) , ( protein: transcription factor, None) , ( DNA: activating transcription factor/ cAMP response element binding ( ATF/CREB ) binding site, None) , ( protein: NF-kappaB, None) 