a panel of monoclonal antibodies was used to detect changes in cell surface antigens defining pre-b cells ( calla ) , resting b cells ( hh1 ) , early ( 4f2 , mhm6 ) and late ( anti-tac , okt9 ) b cell activation , and terminally differentiated b cells ( okt10 ) .
C1155003
b cell activation
C0004561
b cells