9294
We have hypothesized that such defects in fetal/neonatal T-cell activation may be due to lack of expression of the transcriptional regulatory elements required for T-cell activation .
 ( protein: transcriptional regulatory elements, 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: transcriptional regulatory elements, None) 