A novel calcium-activated apamin-insensitive potassium current in pituitary gonadotrophs.


In cultured rat pituitary gonadotrophs, GnRH-induced oscillations in cytosolic calcium concentration ([Ca2+]i) are associated with periodic membrane hyperpolarization. The hyperpolarizing waves are secondary to the activation of apamin-sensitive Ca2+-activated K+ channels that account for a single class of 125I-apamin binding sites present in these cells… (More)


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