What is the first step in T Cell activation? T cell

Last updated: 8/3/2022

What is the first step in T Cell activation? T cell activation. Antigenic fragments are displayed on the antigen presenting cell cell membrane, bound to proteins that are part of the major histocompatibility complex or human leukocyte antigens (HLA). When specific T cell encounters an APC displaying antigenic fragments bound to MHC proteins, it can now recognize antigen as foreign. Antigen presenting cell phagocytizes antigen then digests it.