l arginine l carnitine combination L-Arginine (International Exclusive) – Condemned Labz L-Arginine Complex, Fruit Punch, 16.9
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doi: 10.1093/carcin/bgr068 155 O'ConnorC.PertelT.GrayS.RobiaS

PD-1 similarly functions as a negative regulator of T cell activation, and its expression on Tregs contributes to their suppressive capacity and exhaustion phenotype (34)

[DOI] [PMC free article] [PubMed] [Google Scholar] 376.Aslami H., Heinen A., Roelofs J.J.T.H., Zuurbier C.J., Schultz M.J., Juffermans N.P

Cell Physiol 295 , C708721, (2008)
