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Coated Pit

   Also found in: Encyclopedia 0.01 sec.
Coated Pit
A specialized depression on the cytoplasmic face of the cell membrane, lined by a ‘scaffolding’ protein, clathrin. Coated pits are the 1st stage in forming a coated vesicle, which internalises and degrades receptors for VIP, insulin and other hormones. Coated pits are involved in hormone receptor-mediated endocytosis, and are pivotal in down-regulating hormone activity


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The remaining domains of the LDL receptor provide the sites for sugar attachment; a segment that goes across the cell membrane; and a stretch of amino acids that falls on the cytoplasmic side of the membrane and anchors the receptors to their characteristic surface sites, structures called coated pits.
 
 
 
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