| Term | Definition |
| CD2(LFA-2) | Adhesion and signal transduction(resting T cells/immune & nonimmune cells) |
| CD58(LFA-3) | ligand of CD2Adhesion and signal transduction(resting T cells/immune & nonimmune cells) |
| CD11aCD18(LFA-1; T cells) | Adhesion and signal transduction: augments TH1 response and suppresses TH2 differentiation |
| CD54(ICAM-1; broad distribution) | Adhesion and signal transduction: augments TH1 response and suppresses TH2 differentiation |
| CD102(ICAM-2; endothelial cells) | Adhesion and signal transduction: augments TH1 response and suppresses TH2 differentiation |
| CD28 | necessary for T-cell activation; provides 2nd signal for activation |
| CD152[CTLA-4] | ligation by B7 inhibits T-cell activation |
| CD40L - CD40 | along with CD28 |
| CD45 - CD22 | ligand: phophatase, important in dephosphorylation and deactivation of lck |