The function of MEP1B (meprin A subunit beta, ENSG00000141434) is as follows. Membrane metallopeptidase that sheds many membrane-bound proteins. Exhibits a strong preference for acidic amino acids at the P1' position. Known substrates include: FGF19, VGFA, IL1B, IL18, procollagen I and III, E-cadherin, KLK7, gastrin, ADAM10, tenascin-C. The presence of several pro-inflammatory cytokine among substrates implicate MEP1B in inflammation. It is also involved in tissue remodeling due to its capability to degrade extracellular matrix components. Also cleaves the amyloid precursor protein/APP, thereby releasing neurotoxic amyloid beta peptides (PubMed:27180357). .