Gas-phase acidities of cysteine-polyglycine peptides: the effect of the cysteine position.

Abstract

The sequence and conformational effects on the gas-phase acidities of peptides have been studied by using two pairs of isomeric cysteine-polyglycine peptides, CysGly(3,4)NH(2) and Gly(3,4)CysNH(2). The extended Cooks kinetic method was employed to determine the gas-phase acidities using a triple quadrupole mass spectrometer with an electrospray ionization… (More)
DOI: 10.1016/j.jasms.2009.12.008

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