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Study Sheds Light On Relationship Between Bicarbonate And Vision

March 30, 2015: 12:00 AM EST
A U.S. study finds that bicarbonate, which comes mostly from carbon dioxide waste in our cells, changes the way we see by modifying the visual signal generated by rod and cone photoreceptors that detect light. Bicarbonate opposes the effect of light, limiting the size of the photon response and speeding its recovery. Thus, sensitivity to light is slightly lower but our ability to track moving objects is improved. The researchers say they want to see whether controlling bicarbonate levels in the eye might slow the progress of, or even prevent, eye diseases.
Teresa Duda et al., "Bicarbonate Modulates Photoreceptor Guanylate Cyclase (ROS-GC) Catalytic Activity. ", Journal of Biological Chemistry, March 30, 2015, © The American Society for Biochemistry and Molecular Biology
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