clathrin(redirected from Coated pits, cell-membrane)
Also found in: Medical.
(cell and molecular biology)
A protein that forms a lattice-shaped coating, through the assembly of subunits called triskelions, on the cytosolic side of membrane regions called coated pits during the initial stages of receptor-mediated endocytosis. Invagination of the pit results in a clathrin-coated vesicle.