UBR2 and autoimmune pancreatitis type 1: In 2009, an Italian research observed 90% of IgG4-related pancreatitis could detect peptide AIP(1-7), which shows homology with plasminogen-binding protein (PBP) of Helicobacter pylori and with ubiquitin-protein ligase E3 component n-recognin 2 (UBR2) of acinar cells in the pancreas.