14294
Thus, the regulation of the gene coding for the main T cell growth factor changes irreversibly after the first encounter of T cells with antigen.
 ( protein: T cell growth factor, 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: T cell growth factor, None) 