Comparison of islet cell proliferation in pancreatic islets with (left panel) and without (right panel) menin protein. The pink dots within the dashed yellow circle--indicated by the red arrows-- represent proliferating islet cells. More proliferating cells (pink dots) appear in islets without menin (right).

Image Credit: Ya-Xiong Chen, PhD, University of Pennsylvania School of Medicine, and Cancer Research, June 2006