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Separation and identification of peptide mixtures in a synthesis crude of carbetocin by liquid chromatography/electrospray ionization mass spectrometry
Author(s) -
SanzNebot V.,
Toro I.,
Garcés A.,
Barbosa J.
Publication year - 1999
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/(sici)1097-0231(19991215)13:23<2341::aid-rcm795>3.0.co;2-9
Subject(s) - chemistry , chromatography , electrospray ionization , peptide , mass spectrometry , protein mass spectrometry , peptide synthesis , electrospray , target peptide , biochemistry
In order to separate and characterize the target peptide and the side‐product peptide compounds of a synthesis crude of the peptide hormone carbetocin, liquid chromatography coupled to high‐flow electrospray ionization mass spectrometry (LC/eS‐MS) has been used. Carbetocin is an important drug with recognized therapeutical application for stimulation of uterine contractions to facilitate parturition. Stepwise solid phase peptide synthesis (SPPS) commonly results in unwanted side products associated with incomplete peptide chains. Consequently, this procedure requires extensive purification and characterization of the final synthesis crude. The linear solvation energy relationship (LSER) method has been applied to optimize the proportion of organic modifier of the mobile phase used in the established LC method. On the other hand, ES‐MS has allowed rapid and reliable identification of the target peptide and the other impurities present in the carbetocin synthesis products. Copyright © 1999 John Wiley & Sons, Ltd.