Fig. 3. Morphology of the NE Ca²⁺ store in pancreatic acinar nuclei [modified figure reproduced with permission from The Rockefeller University Press (Gerasimenko et al., 2003)]. (A) Two nuclei stained with Mag Fura Red in the AM form – a Ca²⁺ dye used for NE Ca²⁺ store measurements. (B) Staining of the same nuclei with BODIPY-thapsigargin – an ER-specific dye. (C) Overlay of images shown in A and B. (D) Staining of nucleus with fluorescent BODIPY FL ryanodine. Bars in A (for A-C) and D, 4 µm.