What is it about?
Calculations of the protein infrared absorption of helix bundles revealed that the spectrum is influenced by coupling of C=O (amide I) vibrations in different helices. This shows that the amide I band is influenced not only by secondary structure but also by tertiary structure.
Why is it important?
This work provides a long sought explaination for the unusually high amid I frequency of bacteriorhodopsin trimers.
The following have contributed to this page: Professor Andreas Barth