May be involved in cell-cell interactions. Highly expressed in lung and kidney. Moderate expression in liver and brain, including the cerebral cortex, piriform cortex, nucleus of the lateral olfactory tract, hippocampus, habenular nucleus, and choroid plexus. Belongs to the peptidase M14 family. Although related to peptidase M14 family, lacks the active site residues and zinc-binding sites, suggesting that it has no carboxypeptidase activity.