Lipid Bilayer Membrane Cross-Section

A detailed isometric cross-section of a cell plasma membrane, showing a wide horizontal slice of the phospholipid bilayer with embedded proteins. Each phospholipid is rendered as a round pale-aqua head (hydrophilic) attached to two wavy dark-teal fatty-acid tail lines (hydrophobic). The bilayer arrangement is symmetric top and bottom, creating a ~40 nm-thick slab. Embedded within the bilayer are: one large transmembrane receptor protein (warm terracotta, spanning both leaflets, with an extracellular ligand-binding domain and intracellular kinase domain), one ion channel (sage green, with a central pore visible in cross-section, a gate shown in closed position), a peripheral protein (lavender, attached to the cytoplasmic face by electrostatic interactions shown as dotted lines), and a glycoprotein (olive-green with branching sugar chains on the extracellular side illustrated as a simplified stick figure carbohydrate). Cholesterol molecules are interspersed as small hexagonal flat shapes in muted yellow. Arrows indicate the extracellular ("ECF") and intracellular ("ICF") compartments. Palette: aqua, dark teal, terracotta, sage, muted yellow on a white background. All components labelled with thin black leader lines.

一张细胞质膜等距横截面图，展示磷脂双分子层及其嵌入蛋白。每个磷脂以淡水蓝圆形亲水头和两条深青绿疏水尾表示，上下对称约 40nm 厚。嵌入蛋白：暖赤陶色跨膜受体（含胞外配体结合域和胞内激酶域）、鼠尾草绿离子通道（剖面可见中央孔，关闭状态闸门）、薰衣草色周边蛋白（点线静电附着胞质面）、橄榄绿糖蛋白（胞外侧简化棒状糖链）。淡黄六边形胆固醇散布其中。箭头标注 "ECF" 与 "ICF" 分区。细黑领线标注各组分。