5461
From a murine B-cell cDNA-library we have cloned a cDNA encoding the murine B-cell specific coactivator mBob1 .
 ( DNA: cDNA, None) , ( protein: murine B-cell specific coactivator, None) , ( protein: mBob1, None) , ( DNA: murine B-cell cDNA-library, 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:
 ( DNA: cDNA, None) , ( protein: murine B-cell specific coactivator, None) , ( protein: mBob1, None) , ( DNA: murine B-cell cDNA-library, None) 