The structure of crystalline and membrane-bound gramicidin A by vibrational analysis.
The results of normal mode calculations on the beta 4.4, beta 6.3, beta 5.6, and beta 7.2 structures of gramicidin A are compared with infrared and Raman spectra of crystalline native, crystalline Cs+-bound, and vesicle-bound gramicidin A. The observed frequencies and frequency splittings are in good agreement with an assignment of beta 5.6, beta 7.2, and beta 6.3 structures, respectively, to the gramicidin A molecules in the above three systems.
D003460:Crystallization; D006096:Gramicidin / Q000032:analysis*; D013059:Spectrum Analysis, Raman; D014732:Vibration
D006096:Gramicidin