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DM-GRASP, a novel immunoglobulin superfamily axonal surface protein that supports neurite extension.

Burns F.R., von Kannen S., Guy L., Raper J.A., Kamholz J., Chang S.

We have identified a 95 kd cell surface protein, DM-GRASP, that is expressed on a restricted population of axons. Its expression begins early in chick embryogenesis, and within the spinal cord it is localized to axons in the dorsal funiculus, midline floorplate cells, and motoneurons. Antibodies to DM-GRASP impair neurite extension on axons, and purified DM-GRASP supports neurite extension from chick sensory neurons. We have cloned and sequenced the cDNA corresponding to this protein and find that it is a new member of the immunoglobulin superfamily of adhesion molecules. Consequently we have named this protein DM-GRASP, since it is an immunoglobulin-like restricted axonal surface protein that is expressed in the dorsal funiculus and ventral midline of the chick spinal cord.

Neuron 7:209-220(1991) [PubMed] [Europe PMC]

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