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  • Title: Subunit structure of human fibrinogen, soluble fibrin, and cross-linked insoluble fibrin.
    Author: McKee PA, Mattock P, Hill RL.
    Journal: Proc Natl Acad Sci U S A; 1970 Jul; 66(3):738-44. PubMed ID: 5269236.
    Abstract:
    The three unique polypeptide chains of human fibrinogen differ significantly in molecular weight. Cross-linkage of fibrin by fibrin-stabilizing factor results in the rapid formation of cross-links between gamma-chains and a slower formation of cross-links between alpha-chains. beta-Chains are not involved directly in the cross-linking of fibrin. Reduced, cross-linked fibrin contains uncross-linked beta-chains, dimers of gamma-chain, and higher polymers of alpha-chain. Although it is uncertain whether the gamma-gamma dimers are formed by chains in different molecules of fibrin, the polymers of alpha-chain in fibrin can only be accounted for by cross-linkage of alpha-chains in different molecules. The nature of cross-linkage among the subunits in fibrin can account well for the three-dimensional, covalent structure of cross-linked, insoluble fibrin.
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