Table 1.

Permeability coefficients for oxygen, P_M (cm/s), across the hydrocarbon region of domains in human intact membranes of different age groups at 37 °C.^a

Age Group (years)	0–20	21–40	41–60	61–80
Cortical membranes (bulk + boundary lipids)	76.9±23b	79.8±24	66.3 ±20	73.2±22
Nuclear membranes (bulk + boundary lipids)	51.7±15	45.0±13	53.8 ±16	50.7±15
Cortical membranes (trapped lipids)	19.1±6	23.1±7	16.8 ±5.0	23.2±7
Nuclear membranes (trapped lipids)	12.8±4	10.2±3	8.5 ±2.5	13.9±4
Water layerc	94.4±28	94.4±28	94.4 ±28	94.4±28

^aData taken from [18, 96].

^bP_M was determined as the mean of the maximal and the minimal evaluation, which takes the uncertainty of the location of the spin label nitroxide group into account [94, 95]. Mean values ± differences between mean values and maximal (minimal) evaluations are indicated.

^cThe thickness of the water layer is the same as the hydrocarbon region.