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Tryptophan


Reaction thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
B - John E. Bartmess
RCD - Robert C. Dunbar

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Individual Reactions

L-Tryptophan anion + Hydrogen cation = Tryptophan

By formula: C11H11N2O2- + H+ = C11H12N2O2

Quantity Value Units Method Reference Comment
Deltar1421. ± 9.2kJ/molCIDCJones, Bernier, et al., 2007gas phase; B
Deltar1409. ± 13.kJ/molG+TSO'Hair, Bowie, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Deltar1380. ± 13.kJ/molCIDCO'Hair, Bowie, et al., 1992gas phase; B

Sodium ion (1+) + Tryptophan = (Sodium ion (1+) bullet Tryptophan)

By formula: Na+ + C11H12N2O2 = (Na+ bullet C11H12N2O2)

Quantity Value Units Method Reference Comment
Deltar205. ± 13.kJ/molIMREGapeev and Dunbar, 2003Anchor glycine=38.5+-2.6; RCD
Deltar210.kJ/molCIDCKish, Ohanessian, et al., 2003Anchor alanine=39.89; RCD

References

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Jones, Bernier, et al., 2007
Jones, C.M.; Bernier, M.; Carson, E.; Colyer, K.E.; Metz, R.; Pawlow, A.; Wischow, E.D.; Webb, I.; Andriole, E.J.; Poutsma, J.C., Gas-phase Acities of the 20 Protein Amino Acids, Int. J. Mass Spectrom., 2007, 267, 1-3, 54-62, https://doi.org/10.1016/j.ijms.2007.02.018 . [all data]

O'Hair, Bowie, et al., 1992
O'Hair, R.J.; Bowie, J.H.; Gronert, S., Gas Phase Acidity of the alpha-Amino Acids, Int. J. Mass Spectrom. Ion Proc., 1992, 117, 23, https://doi.org/10.1016/0168-1176(92)80083-D . [all data]

Gapeev and Dunbar, 2003
Gapeev, A.; Dunbar, R.C., Na+ Affinities of Gas-Phase Amino Acids by Ligand Exchange Equilibrium, Int. J. Mass Spectrom., 2003, 228, 2-3, 825, https://doi.org/10.1016/S1387-3806(03)00242-2 . [all data]

Kish, Ohanessian, et al., 2003
Kish, M.M.; Ohanessian, G.; Wesdemiotis, C., The Na+ affinities of a-amino acids: side-chain substituent effects, Int. J. Mass Spectrom., 2003, 227, 3, 509, https://doi.org/10.1016/S1387-3806(03)00082-4 . [all data]


Notes

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