STX enhances calcium entry in islets and isolated β-cells.

<p>A, [Ca²⁺]_i recording of an islet of Langerhans in the presence of 8 mM glucose; 10 nM STX was added to the perfusion when indicated; n = 11 islets from 3 different male mice. B, [Ca²⁺]_i recording of an isolated pancreatic β-cell in the presence of 8 mM glucose; 10 nM STX was added to the perfusion when indicated. C, Area under the curve in [Ca²⁺]_i recordings from isolated β-cells. * p<0.000005; n = 100 cells from 3 different male mice.