Figure 2.

The proposed mean lateral arrangements of phospholipid classes in the outer and inner leaflet of the human erythrocyte membrane. (A) The proposed lateral arrangement of the head groups in the outer leaflet. The SL is based on unit cell D in Fig. 1, which predicts the abundance of 11.1 and 88.9 mol % of ethanolamine (black) and choline (white) lipids, respectively. (B) The proposed lateral arrangement in the inner leaflet. The SL is based on the ternary unit cell J in Fig. 1, predicting the molar percentages of 44.4, 33.3, and 22.2 for the ethanolamine (black), acidic (gray), and choline (white) phospholipid classes, respectively.