Enables carbohydrate binding activity. Involved in central nervous system myelin formation and locomotory behavior. Acts upstream of or within several processes, including nervous system development; positive regulation of neuron projection development; and positive regulation of sodium ion transport. Is anchored component of postsynaptic membrane. Is anchored component of presynaptic membrane. Is expressed in several structures, including alimentary system; brain; cranial ganglion; genitourinary system; and sensory organ. Used to study Compton-North congenital myopathy. Human ortholog(s) of this gene implicated in Compton-North congenital myopathy. Orthologous to human CNTN1 (contactin 1). [provided by Alliance of Genome Resources, Apr 2022]