4412
In contrast, we found that AR can initiate apoptosis in S49 cells after treatment with 5 alpha-dihydrotestosterone , despite its relative inability to induce high level expression of MMTV .
 ( cell line: S49 cells, None) , ( protein: AR, 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:
 ( cell line: S49 cells, None) , ( protein: AR, None) 