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Immunoassay reagents intended to perform qualitative and/or quantitative analyses of body fluids to determine retinol binding protein (RBP), an alpha-globulin protein secreted by the liver that forms a complex with transthyretin. This complex binds and transports retinol (vitamin A) to the peripheral tissues. The level of RBP in plasma is a sensitive indicator of protein malnutrition or liver dysfunction due to their short half-life in healthy conditions; its level in serum also increases in chronic renal diseases and decreases in protein malnutrition and during liver diseases.
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