the protein checkpoint slow down cells

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The protein PD-1 is a checkpoint to slow down T-cells. Royalty Free Stock Photo
The protein PD-1 is a checkpoint to slow down T-cells. Royalty Free Stock Photo
   
   
   
   
   
The protein PD-1 is a checkpoint to slow down T-cells.
   
   
   
   
   
   
   
PD-1 red extends from the surface of a T-cell and interacts with the ligand protein PD-L1 yellow from a antigen presenting cell. Although the T-cell has been activated through the interaction of a T-cell receptor blue and a MHC protein violett, PD-1 regulates these activation down. It is a checkpoint to slow down T-cells.

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