 The olfactomedin is an extracellular matrix protein with no defined role but is abundantly found in the olfactory neuroepithelium.In the myocilin protein, the domain consists of a single disulfide bond which connects two cysteine residues (245 and 433 amino acids).Myocilin is specifically located in the ciliary rootlet and basal body which connects to the cilium of photoreceptor cells in the rough endoplasmic reticulum.