Cell surface receptor — Free Biology Illustration

Biology

Cell surface receptor

Stylized 2D cartoon of a cell-surface receptor protein embedded upright in the plasma membrane. The receptor has a prominent extracellular ligand-binding domain or pocket projecting above the lipid bilayer, a narrow membrane-spanning transmembrane segment crossing the bilayer, and a shorter intracellular signaling tail extending below. The protein is shown as a smooth blue, teal, purple, or blue-green form, sometimes Y-shaped, curved, rod-like, modular, or serpentine, but clearly identifiable as a membrane receptor distinct from soluble proteins. The membrane may be shown as a lipid bilayer, with the receptor protruding on both sides and a clearly defined top extracellular region and bottom intracellular region.

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