5017
By titrating the oestrogen concentration in these stably transfected cells , the growth retarding and the transactivating function of the chimeric proteins could not be dissociated.
 ( protein: chimeric proteins, None) , ( cell line: stably transfected cells, 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: chimeric proteins, None) , ( cell line: stably transfected cells, None) 