The Dual Function of the Polybasic Juxtamembrane Region of Syntaxin 1A in Clamping Spontaneous Release and Stimulating Ca2+-Triggered Release in Neuroendocrine Cells. - Singer-Lahat D; Barak-Broner N; Sheinin A; Greitzer-Antes D; Michaelevski I; Lotan I (The Journal of neuroscience : the official journal of the Society for Neuroscience, 2018)