Multiple Isomers and Protonation Sites of the Phenylalanine/Serine Dimer

Our investigation of the phenylalanine/serine (Phe/Ser) protonated dimer suggests that the intermolecular interaction between the two amino acids is more complex than could have been anticipated from previous studies of similar systems. Isomer-specific infrared (IR) spectra, rec-orded at an internal temperature of ~10 K, demonstrate the presence of at least five isomers with non-zwitterionic structures. Moreover, isotopic substitution experiments provide evidence for different protonation sites among the-se isomers.


Published in:
Journal of the American Chemical Society, 134, 27, 11053–11055
Year:
2012
Keywords:
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 Record created 2012-06-26, last modified 2018-12-03


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