The identification of serum tuftsin by reverse-phase high-performance liquid chromatography and mass spectrometry |
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Authors: | J O Naim D M Desiderio J Trimble J R Hinshaw |
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Institution: | Department of Surgery, Rochester General Hospital, New York 14621. |
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Abstract: | We describe for the first time a method for unambiguously identifying the phagocytic stimulating tetrapeptide tuftsin from trypsinized human serum. The method consists of separating serum tuftsin by reverse-phase (RP)-HPLC, collecting HPLC fractions corresponding to the synthetic tuftsin retention time, and then subjecting those fractions to mass spectrometry/mass spectrometry (MS/MS) analysis, which provides optimal molecular specificity to the measurement. Although quantification was not the goal, it was estimated that the amount of tuftsin found by RP-HPLC and MS/MS was in the hundreds of nanograms per milliliter. |
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