10716
The T-cell receptor (TCR) beta-chain promoters have been characterized as nonstructured basal promoters that carry a single conserved ubiquitous cyclic AMP-responsive element .
 ( DNA: T-cell receptor (TCR) beta-chain promoters, None) , ( DNA: nonstructured basal promoters, None) , ( DNA: ubiquitous cyclic AMP-responsive element, 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: T-cell receptor (TCR) beta-chain promoters, None) , ( DNA: nonstructured basal promoters, None) , ( DNA: ubiquitous cyclic AMP-responsive element, None) 