. "\"The change in morphology and behavior of an alpha-beta T cell resulting from exposure to a mitogen, cytokine, chemokine, cellular ligand, or an antigen for which it is specific.\" [GOC:add]" . . "alpha-beta T cell activation" . "alpha-beta T lymphocyte activation" . "alpha-beta T-cell activation" . "alpha-beta T-lymphocyte activation" . .