1453
The OBF-1 mRNA is expressed in a highly cell-specific manner, being most abundant in B cells and essentially absent in most of the other cells or tissues tested.
 ( protein: OBF-1, None) , ( cell type: B cells, None) , ( RNA: OBF-1 mRNA, 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: OBF-1, None) , ( cell type: B cells, None) , ( RNA: OBF-1 mRNA, None) 