4065
Spi-B expression is very abundant in B cells and both Spi-B mRNA and protein are detected in some T cells .
 ( cell type: B cells, None) , ( RNA: Spi-B mRNA, None) , ( cell type: T cells, None) , ( protein: Spi-B, None) , ( protein: Spi-B, 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: B cells, None) , ( RNA: Spi-B mRNA, None) , ( cell type: T cells, None) , ( protein: Spi-B, None) , ( protein: Spi-B, None) 