12228
However, in mutant mice lacking functional Ikaros transcription factors , there are deficiencies in lymphoid precursor cells , in mature lymphoid cells and in DC .
 ( protein: Ikaros, None) , ( cell type: DC, None) , ( protein: transcription factors, None) , ( cell type: lymphoid precursor cells, None) , ( cell type: mature lymphoid 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: Ikaros, None) , ( cell type: DC, None) , ( protein: transcription factors, None) , ( cell type: lymphoid precursor cells, None) , ( cell type: mature lymphoid cells, None) 