SSPO

SCO-spondin is a is_associated_with::protein that in humans is encoded by the SSPO is_associated_with::gene. SCO-spondin is secreted by the is_associated_with::subcommissural organ, and contributes to commissural axon growth and the formation of is_associated_with::Reissner's fiber, a fibrous aggregation of secreted molecules extending from the subcommissural organ to the end of the spinal cord.