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A fraction of fibrinogen contains a differently spliced gamma chain called gamma', which presents itself mainly as heterodimer with the common gammaA chain as gammaA/gamma' fibrinogen. The gamma' chain differs from the gammaA chain in its C-terminus and has important functional implications for fibrinogen. The presence of the gamma' chain modulates thrombin and FXIII activity, influences clot architecture, and eliminates a platelet-binding site. Associations of gammaA/gamma' fibrinogen levels with arterial and venous thrombosis have been reported, indicating that the functional effects of gammaA/gamma' fibrinogen may contribute to the pathology of thrombosis. This review summarizes the key biologic aspects of this interesting variant of fibrinogen and discusses inconsistencies in current reports.
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Willige et al. (2009) studied this question.
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