Figure 1.

Temperature dependence of “leak” potassium flux in different leaky membrane variants among the hereditary stomatocytosis conditions. Open symbols denote normal red cells. Closed symbols denote patients, detailed below and in the Table. Potassium influx was measured using ⁸⁶Rb as a tracer. The medium contained (mM): Na⁺, 145: K⁺, 5; Cl⁻, 150, MOPS, 15 (pH 7.4 at 20°C); glucose, 5; ouabain, 0.1; bumetanide, 0.1. Reproduced with permission from Stewart (2004).