CR1 and chronic pancreatitis: A rat PoAb (C2-1) targeting the Gly116–Lys127 region of CR1 (CFC domain) was developed by Tsutsumi et al. and was shown to detect CR1 in urinary bladder and gall bladder/pancreatic tumors, in ductal cells of chronic pancreatitis tissue, and in some islet cells of the normal pancreas [44,45,46,47].