Lipid DMPC DOPC
References 4 5
Fatty acid structure C14:0 C18:1
Area per lipid molecule (A) (Å2) 60.6 72.5
Inter C-C distance (Å)* 4.39 4.80
Interaction energy U (kJ/mol) – 0.61 – 0.41
Decrease in interaction energy (kJ/mol)   32.8%
*The calculation of the inter C-C distance is from the area per lipid molecule (A) (Å2)
The interaction energy is given by: U=11.5×10-6/r12-5.96×10-3/r6 kJ/mol
DMPC: Dimyristoyl-Phosphatidylcholine; DOPC: Dioleoyl-Phosphatidylcholine
Table 1: Experimental data of fully hydrated fluid phase, artificial phosphatidylcholine lipid bilayers.