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Intraislet variation in PC1/3 expression in beta cells of donors control. (A) Shown are representative islets of donors indicated in Fig. 2B double-labeled for insulin (red) and PC1/3 (green). Note that level of PC1/3 varies between beta cells of the same islet irrespectively of total fluorescence level for the islet. Bar: 15 µm. Abbreviation: PC1/3, proprotein convertase 1/3.
