Most lipids have some what character ?
The energy requirements to generate a cylinder shaped cell from an originally flat membrane can be expressed asFCyl = πxLxKb ( 1 / R - 2JB ) where L is the length of the cylinder , JB is the difference between the spontaneous curvature , Js , for the lipids in the inner and outer leaflet divided by two , and Kb is the bending modulus of the bilayer .