A Fourier transform infrared spectroscopic study of the molecular interaction of cholesterol with 1,2-dipalmitoyl-sn-glycero-3-phosphocholine

A comparison of the interactions of cholesterol and gramicidin A with lipid bilayers using an infrared data station

“…The influence of cholesterol on the phase transition of both lecithins is shown in fig.l,2. These results are similar to those obtained in [8,11] by IR spectroscopy and agree with those obtained by others using a great variety of physical techniques [ 12], i.e., the presence of cholesterol causes shifts in band frequencies which indicate that an increase in the number of gauche conformers occurs below T c (less order)' and a decrease in this number above T c (more order). This effect increases with greater amounts of cholesterol in the bilayer.…”

Thermal Stability and Aggregation of Sulfolobus solfataricus β-Glycosidase Are Dependent upon the N-∈-Methylation of Specific Lysyl Residues

“…This is the rate of change of the absorbance as a function of the temperature and represents a measure of the total changes in a particular peak (35,37). The plots of ⌬A/°C versus temperature for the native and the recombinant proteins are shown in Fig.…”

Reflection–absorption FT-IR spectroscopy of pentadecanoic acid at the air/water interface

“…Decreases in the observed peak frequencies for the conformation sensitive methylene stretching vibrations have been empirically correlated with an increase in the relative number of trans conformers with a concomitant reduction in gauche defects within the alkyl chains of the monolayer [25][26][27][28][29][30][31][32]. However quantitative correlations between the magnitude of the frequency shifts and the extent of ordering have yet to be established.…”