Clinical Chemistry
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Clinical Chemistry 30: 149-151, 1984;
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Clinical Chemistry, Vol 30, 149-151, Copyright © 1984 by American Association for Clinical Chemistry

Enzyme-linked immunosorbent assay of retinol-binding protein in serum and urine

S Lucertini, P Valcavi, A Mutti and I Franchini

This highly sensitive method for determining retinol-binding protein in human serum and urine is based on a double-antibody "sandwich"-type enzyme-linked immunosorbent assay. The assayable concentration range is 0.8-48 micrograms/L, the detection limit 0.2 micrograms/L. Within-assay coefficients of variation for 10 determinations at two different concentrations were 5.5 and 5.8%. The corresponding between-assay CVs were 7.9 and 9.2%. We saw no interference from any components of urine or serum. The mean urinary excretion by 30 healthy subjects, as determined by this method, was 101 micrograms/g of creatinine (SD 38.8). The concentration in serum averaged 43 mg/L (SD 12.1).




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Copyright © 1984 by the American Association for Clinical Chemistry.