L1 (protein)
（重定向自L1CAM）
L1, also known as L1CAM, is a transmembrane protein; it is a neuronal cell adhesion molecule, member of the L1 protein family, of 200-220 kDa, and involved in axon guidance and cell migration with a strong implication in treatment-resistant cancers.
L1CAM has also been designated CD171 (cluster of differentiation 171).