Recombinant human NCAM1 (Neural Cell Adhesion Molecule 1, also known as CD56) encompassing amino acids 20-718. This construct contains a C-terminal Avi-Tag™ followed by a C-terminal His-tag (6xHis). The recombinant protein was affinity purified. HiP™ indicates a high purity protein (≥90% pure) and less than 10% aggregation as measured by gel filtration.