CD11

{{More citations needed|date=July 2023}}

In cell biology, CD11 is the α (alpha) component of various integrins, especially ones in which the β (beta) component is CD18 (β2) and mediate leukocyte adhesion.{{Cite web |title=CD11 - an overview {{!}} ScienceDirect Topics |url=https://www.sciencedirect.com/topics/biochemistry-genetics-and-molecular-biology/cd11 |access-date=2023-07-07 |website=www.sciencedirect.com}} For example,

• LFA1 (CD11a/CD18) short representation of Lymphocyte Function-associated Antigen 1, also called α_Lβ₂ integrin
• Mac1 (CD11b/CD18) present on macrophages that is also called Macrophage-1 antigen (CR3) and α_Mβ₂ integrin.
• CD11c/CD18 also called complement receptor 4 (CR4) and α_Xβ₂ integrin.