Human RBP4 Analyte Overview
Also known as retinol binding protein 4
Retinol binding protein 4 (RBP4) is a member of the lipocalin family of proteins, known for their ability to bind and transport small lipophilic proteins. As its namesake suggests, RBP4 is known for binding retinol (vitamin A). Most RBP4 is produced in the liver, where retinol is stored as retinyl esters. To leave the liver, the retinyl esters are first hydrolyzed to retinol and then bound to RBP4 within hepatocytes. The complex then binds transthyretin and the 3-part complex is released into the bloodstream for delivery to specific tissues.
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