VIBRATIONAL SPECTROSCOPIC STUDY OF THE INTERACTION BETWEEN Ge-132 AND DIPALMITOYLPHOSPHATIDYLCHOL INE

The vibrational spectra of both pure DPPC liposomes and DPPC multilayers reconstituted with Ge-132are reported as a function of temperature from 290 to 330K.The results show that the addition of Ge-132results in suppression of the pretransition behavior and reduction of temperature of the main transition forreconstituted system.The results also show that the degree of rigidity of the acyl chain in the presence ofGe-132 is lower than that in pure DPPC dispersion within the investigated temperature range.