2385
The cognate interaction between T cells and antigen-presenting cells ( APCs ), mediated by major histocompatibility complex (MHC) class II molecules , results in the delivery of activation signals to the APC .
 ( cell type: antigen-presenting cells, None) , ( cell type: APCs, None) , ( cell type: T cells, None) , ( protein: major histocompatibility complex (MHC) class II molecules, None) , ( cell type: APC, 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: antigen-presenting cells, None) , ( cell type: APCs, None) , ( cell type: T cells, None) , ( protein: major histocompatibility complex (MHC) class II molecules, None) , ( cell type: APC, None) 