Plasma retinol binding protein 4 (RBP4), Interstitial retinol binding protein 4, RBP.
Retinol binding protein (RBP4) belongs to the lipocalin superfamily of proteins. It is synthesized and secreted by hepatic paraenchymal cells and is involved in the binding of retinol and transthyretin preventing loss by glomerular filtration and renal e