May act as a soluble regulator of keratinocyte differentiation. Homooligomer. Seems to be able to homodimerize and homotrimerize (By similarity). Highly expressed in stratified epithelia; such as the skin, tongue, esophagus, forestomach and vagina. Also found in lung, trachea and urinary bladder. Expression begins during the period of stratification at 15.5 dpc, increases up to 17.5 dpc and decreases at 18.5 dpc. O-glycosylated. Belongs to the dermokine family.