Retinol Binding Protein 4 (RBP4) Antibody – Mouse Monoclonal

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 blocks secretion of the binding protein posttranslationally and results in defective delivery and supply to the epidermal cells. [provided by RefSeq]

Function: Delivers retinol from the liver stores to the peripheral tissues. In plasma, the RBP-retinol complex interacts with transthyretin, this prevents its loss by filtration through the kidney glomeruli.

Subcellular location: Secreted.

Involvement in disease: Defects in RBP4 are a cause of retinol-binding protein deficiency (RBP deficiency) [

MIM:180250]. This condition causes night vision problems. It produces a typical 'fundus xerophthalmicus', featuring a progressed atrophy of the retinal pigment epithelium.

Sequence similarities: Belongs to the calycin superfamily. Lipocalin family.

Mass spectrometry: Molecular mass is 21063.46±1.88 Da from positions 17 - 199. Determined by ESI. Ref.10Molecular mass is 20534 Da from positions 19 - 197. Determined by MALDI. Ref.12Molecular mass is 20162 Da from positions 19 - 194. Determined by MALDI. Ref.12

Sequence caution: The sequence AAF69622.1 differs from that shown. Reason: Erroneous initiation.