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A reliable method for the confirmation of the synthetic hormone stanozolol and its major metabolite, 16β-hydroxystanozolol, in bovine urine by liquid chromatography coupled with tandem mass spectrometry has been developed. [ 2 H 3 ]Stanozolol was used as internal standard. Sample preparation involved enzymatic hydrolysis, liquid-liquid extraction and purification on an amino solid-phase...
The gastrointestinal peptide glucose-dependent insulinotropic polypeptide (GIP 1-42 ) is one of the incretin hormones regulating glucose-induced insulin secretion from the endocrine pancreas. GIP 1-42 is a substrate of the circulating enzyme dipeptidyl peptidase IV, which removes the N-terminal peptide Tyr-Ala resulting in the inactive polypeptide GIP...
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