Thrombin-stimulated cell division involves proteolysis of its cell surface receptor

Abstract
A cell-surface component of MW 43,000 was cleaved by thrombin on [chick-embryo] cells that divide after thrombin treatment, but was not cleaved on cells that are unresponsive to its mitogenic action. Studies with a photoreactive derivative of thrombin showed that its cell surface receptor has a MW of 43,000 and indicated that thrombin must cleave its receptor to stimulate cell division.