1423
Transfected U937 cells stably overexpressing PKC-zeta displayed a longer doubling time, lower saturation density at confluency, and an increase in adherence to plastic as compared to control cells .
 ( protein: PKC-zeta, None) , ( cell line: control cells, None) , ( cell line: U937 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: PKC-zeta, None) , ( cell line: control cells, None) , ( cell line: U937 cells, None) 