CD11a

Integrin, alpha L (antigen CD11A (p180), lymphocyte function-associated antigen 1; alpha polypeptide), also known as ITGAL, is a human gene.

CD11a is one of the two components, along with CD18, which form lymphocyte function-associated antigen-1.

Efalizumab acts as an immunosuppressant by binding to CD11a.