carrier protein


A Molecular Boat It Is

a: carrier protein ~
b: a boat


"Under physiological conditions, virtually all vitamin A in the blood is not in its free form but bound to its high-affinity carrier protein. If this carrier protein is like a boat that carries vitamin A, how does it know when to unload its cargo? It was proposed more than 30 years ago that a cell-surface receptor exists that specifically binds to the carrier protein and mediates vitamin A uptake."

Writer: Hui Sun, PhD
Date: Dec 25 2014 11:11 AM

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