Figure 4.
T cell co-stimulation and co-inhibition. TCR: T cell receptor; MHC: Major histocompatibility complex; CTLA: Cytotoxic T-lymphocyte-associated protein.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.