TABLE 2.

Exploration of the hydrocarbon/water interface by the terminal methyl groups. The percentages of the terminal methyl groups exploring the polar region, calculated by subtracting from the total area under the distribution the area under the Gaussian function fitted to the central peak, are listed in the first column. The percentages (numbers) of the sn-1 and sn-2 acyl chain terminal methyl groups able to explore the interface. In each column, the average numbers of methyl groups in the simulation cell of 72 lipids exploring the interface is indicated in parentheses.

Bilayer	terminal methyl groups in the interface	sn-1	sn-2
DOPC	8.8 % (~ 6.3)	48% (~ 3.1)	52% (~ 3.2)
SOPC	6.6 % (~ 4.7)	35% (~ 1.6)	65% (~ 3.1)
POPC	7.0 % (~ 5.0)	37% (~ 1.8)	63% (~ 3.2)
OMPC	5.0 % (~ 3.6)	83% (~ 3.0)	17% (~ 0.6)
DMPC	3.2 % (~2.3)	62% (~1.4)	38% (~0.9)