Functions in exocytosis in pancreatic acinar cells regulating the fusion of zymogen granules with each other. May have a pore-forming activity on membranes and regulate exocytosis in other exocrine tissues (By similarity).
Subcellular locations: Zymogen granule membrane, Zymogen granule lumen
Associated in a cholesterol-dependent manner with lipid rafts of zymogen granule membranes.