12761
The augmentation of B cell proliferation by CD70 transfectants was apparent in CD27+ B cells , but was mild in CD27- B cells .
 ( cell type: CD27- B cells, None) , ( cell type: CD27+ B 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:
 ( cell type: CD27- B cells, None) , ( cell type: CD27+ B cells, None) 