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CD11 is the α (alpha) component of various integrins, especially ones in which the β (beta) component is CD18 (β2) and mediate leukocyte adhesion. For example,
- LFA1 (CD11a/CD18) short representation of Lymphocyte Function-associated Antigen 1, also called αLβ2 integrin
- Mac1 (CD11b/CD18) present on macrophages that is also called Macrophage-1 antigen (CR3) and αmβ2 integrin.
- CD11c/CD18 also called complement receptor 4 (CR4)
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