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  • Title: Sensitive enzyme immunoassay for human aldolase A.
    Author: Okajima K, Kurobe N, Shimizu K, Kato K.
    Journal: Clin Chim Acta; 1990 Mar 15; 187(3):265-72. PubMed ID: 2182223.
    Abstract:
    A sensitive sandwich-type enzyme immunoassay for the aldolase isozyme, A4, was developed using purified antibodies specific to the A subunit of aldolase. The antibodies were raised in sheep being immunized with purified aldolase A4 and then purified by immunoaffinity chromatography on a column of aldolase A4-coupled Sepharose. The assay system consisted of polystyrene balls with immobilized antibody F(ab')2 fragments and the same antibody F(ab')2 fragments labeled with beta-D-galactosidase from Escherichia coli. The assay was sensitive enough to detect 10 pg/tube of aldolase A4. The assay was specific to the A subunit of aldolase (aldolase A). It cross-reacted about 40% to aldolase A3C, 7% to A2C2 and 0.3% to AC3, but not cross-reacted with C4 nor B4. Coefficients of variation in intra- and inter-assay were less than 16%. Serum aldolase A levels were determined in healthy adults, which were about 200 ng/ml. The distribution and concentrations of immunoreactive aldolase A in various human tissues were also determined. High concentrations of aldolase A were found in skeletal muscle, heart muscle, cerebrum and lymphatic tissue.
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