Fig. 5From: Acidification of the synaptic cleft of cone photoreceptor terminal controls the amount of transmitter release, thereby forming the receptive field surround in the vertebrate retinaConcentration-dependent effects of HEPES on monkey HC light response. Light responses of an HC in macaque monkey retina illuminated to a 2,000-μm diameter spot light were obtained by intracellular recording. HEPES at 1, 5 and 20 mM increased the hyperpolarization amplitude and decreased the slow depolarization in a dose-dependent manner (from Davenport et al. [64])Back to article page