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The authors have proposed an immobilized enzymatic fluorescence capillary biosensor (SBAs-IE-FCBS) for the determination of sulfated bile acids (SBAs). The reaction principle of the biosensor is that under the catalysis of the bile acid sulfate sulfatase (BSS) and β-hydroxysteroid dehydrogenase (β-HSD) immobilized on inner surface of a medical capillary, SBAs desulfates to 3β-hydroxyl bile acids,...
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