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Retinol, is one of the animal forms of vitamin A. It is a diterpenoid and an alcohol. When referring to dietary allowances or nutritional science, retinol is usually measured in international units (IU). — “Retinol - Wikipedia, the free encyclopedia”, en.wikipedia.org
Retinol-binding proteins are a family of proteins with diverse functions. Retinol binding protein (4) · Transcobalamin. Other. Acyl carrier protein · Adaptor protein · Cholesterylester transfer protein · F-box protein · GTP-binding protein · Latent TGF-beta binding protein · Light-harvesting complex. — “Retinol binding protein - Wikipedia, the free encyclopedia”, en.wikipedia.org
The structure of retinol, the most common dietary form of vitamin A The retinol form functions as a storage form of the vitamin, and can be converted to and from its visually active aldehyde form, retinal. — “Vitamin A - Wikipedia”, en.wikipedia.org