The primary structure of a protein contains the peptide bond (-CO-NH-), which has the ability to form hydrogen bonds and influence protein molecular shape. (a) If the force constant of N-H bonds in non-hydrogen bonded regions of a protein is 680 Nm?, predict the vibrational wavenumber value for non-hydrogen bonded N-H stretching in the infrared spectra of proteins. Show all working. (b) A hydrogen-bonded section of a protein produces a N-H stretching band at 3386 cm in the infrared spectrum. Determine the force constant for the hydrogen bonded N-H in the protein. Show all working. (c) Briefly describe how the presence of hydrogen bonding influences the N-H stretching mode of proteins.

The primary structure of a protein contains the peptide bond (-CO-NH-), which has the ability to form hydrogen bonds and influence protein molecular shape. (a) If the force constant of N-H bonds in non-hydrogen bonded regions of a protein is 680 Nm?, predict the vibrational wavenumber value for non-hydrogen bonded N-H stretching in the infrared spectra of proteins. Show all working. (b) A hydrogen-bonded section of a protein produces a N-H stretching band at 3386 cm in the infrared spectrum. Determine the force constant for the hydrogen bonded N-H in the protein. Show all working. (c) Briefly describe how the presence of hydrogen bonding influences the N-H stretching mode of proteins.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

The primary structure of a protein contains the peptide bond (-CO-NH-), which has the ability to form
hydrogen bonds and influence protein molecular shape.
(a) If the force constant of N-H bonds in non-hydrogen bonded regions of a protein is 680 Nm',
predict the vibrational wavenumber value for non-hydrogen bonded N-H stretching in the infrared
spectra of proteins. Show all working.
(b) A hydrogen-bonded section of a protein produces a N-H stretching band at 3386 cm1 in the
infrared spectrum. Determine the force constant for the hydrogen bonded N-H in the protein. Show
all working.
(c) Briefly describe how the presence of hydrogen bonding influences the N-H stretching mode of
proteins.

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