12911
These results indicate that lymphoid progenitor cells in tg epsilon26 mice are genetically defective in thymic choice between T cells and B cells , generating B cells even in normal thymus environment .
 ( protein: tg epsilon26, None) , ( cell type: lymphoid progenitor cells, None) , ( cell type: T cells, None) , ( cell type: B cells, None) , ( cell type: B 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: tg epsilon26, None) , ( cell type: lymphoid progenitor cells, None) , ( cell type: T cells, None) , ( cell type: B cells, None) , ( cell type: B cells, None) 