Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.
Vitamin A forms the visual purple and visual violet of the rods and cones of the retina. You might have heard of rhodopsin and iodopsin pigments present in rods and cones, respectively. These are conjugated proteins. For example, rhodopsin is composed of opsin and reteneine. The latter is given by vitamin A.
