unilamellar lipid vesicles

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Fit model: unilamellar lipid vesicles



Parameters:


parameter

description

F_scal

scaling parameter (should be between 0.1 and 10 - see here)

F_rad

average radius

F_epsilon1

displacement of the inner head groups from the vesicle center

F_cont1

contrast in region of inner head groups (see here)

F_sigma1

uncertainty of the head groups' position

F_epsilon2

displacement of the chains from the vesicle center

F_cont2

contrast in region of chains (see here)

F_sigma2

uncertainty of the chains' position

F_epsilon3

displacement of the outer head groups from the vesicle center

F_cont3

contrast in region of outer head groups (see here)

F_sigma3

uncertainty of the head groups' position

S_phi

volume fraction



Remarks:

In this analytical model the electron density profile across the depth of a bilayer is described by a summation of n Gaussian peaks, each representing a particular lipid moiety or region.

The model assumes n=3.



References:

M. Brzustowicz & A. Brunger, J. Appl. Cryst. 38, 126 (2005)