Retinol Binding Protein/RBP1 [G4E4]

This protein belongs to the lipocalin family and is the specific carrier for retinol (vitamin A alcohol) in the blood. It delivers retinol from the liver stores to the peripheral tissues. In plasma, the RBP-retinol complex interacts with transthyretin which prevents its loss by filtration through the kidney glomeruli. A deficiency of vitamin A block’s secretion of the binding protein posttranslationally and results in defective delivery and supply to the epidermal cells.