“…In contrast, there is evidence that non-β-cells express an A-type transient K + current [29,31,38,46–48], a Na + current with depolarized inactivation properties relative to the β-cell [11,29,39–41,44–47,49,50] and T-type Ca 2+ channels [3,38,46]. Several laboratories have used these different electrophysiological fingerprints to distinguish between α-, β- and δ-cells [11,13,31,34–36,39–44,46–48,50–53]. …”