Bestrophin 1 (BEST1) is a protein that is encoded by the BEST1 gene in humans. It is primarily expressed in retinal cells, particularly in the retinal pigment epithelium (RPE), and plays an important role in the function of the retina. Bestrophin 1 is believed to be involved in the regulation of ion channels, particularly chloride channels, and is thought to have a role in maintaining the ionic balance and fluid homeostasis in the eye.
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