The PD-1/PD-L1 complex resembles the antigen-binding Fv domains of antibodies and T cell receptors.
Proc Natl Acad Sci U S A. 2008 Feb 26;105(8):3011-6. doi: 10.1073/pnas.0712278105. Epub 2008 Feb 14.
Proc Natl Acad Sci U S A. 2008.
PMID: 18287011
Free PMC article.