Epithelial and hemopoietic transmembrane mucin that may play a role in cell signaling.
Subcellular locations: Cell membrane, Apical cell membrane, Secreted
Also exists as a soluble form.
Highly expressed in epithelial tissues, particularly those of the gastrointestinal and respiratory tracts, such as large intestine and trachea, followed by kidney, small intestine, appendix and stomach.