Effect of the orientation of dipole fragments of the phospholipid molecule on the bilayer structure
Badalian, G.G.; Shaginian, A.A.
Biofizika 33(1): 92-96
1988
ISSN/ISBN: 0006-3029 PMID: 3370243 Document Number: 315407
By the method of minimization of phospholipid bilayers free energy it was shown that at a decrease of inclination angle of dipole fragments of phospholipid molecules to the bilayer surface there take place: a) an increase of bilayer density, b) a decrease of bilayer thickness caused by a decrease of dipole repulsive forces, c) an increase of the number of molecules in the bilayer due to hydrophobization of the latter. The existence of upper and lower critical angles of dipoles inclination to the bilayer surface were found: theta upcrit, theta lowcrit, if theta greater than or equal to the layers must be destroyed, and if theta less than or equal to theta lowcrit, transition of bilayers to the crystalline state must take place.