12095
In addition, lack of natural killer cells and selective defects in gamma delta T cells and dendritic antigen-presenting cells point to Ikaros as an essential factor for the establishment of early branchpoints of the T cell pathway .
 ( cell type: gamma delta T cells, None) , ( cell type: natural killer cells, None) , ( cell type: dendritic antigen-presenting cells, None) , ( protein: Ikaros, 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: gamma delta T cells, None) , ( cell type: natural killer cells, None) , ( cell type: dendritic antigen-presenting cells, None) , ( protein: Ikaros, None) 