ENTPD1 and chronic pancreatitis: The results demonstrated the enzyme CD39, responsible for catalyzing the conversion of ATP to ADP and AMP, is highly expressed on macrophages, pericytes, endothelial cells, and acinar cells (Figure 2D); whereas, similar to what we identified in human chronic pancreatitis, CD73 is highly expressed in a mucin/ductal cell population as well as in T cells, macrophages, and B cells (Figure 2E).