May influence the maintenance, growth, or differentiation of chemosensory cilia on the apical dendrites of olfactory neurons. Major component of the extracellular matrix of the olfactory neuroepithelium. Oligomer; disulfide-linked. Expressed exclusively in olfactory neuroepithelium. Most, if not all, of the six potential sites for N-glycosylation carry carbohydrate moieties of 8-10 sugar residues.