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  • Title: Rheological characterization and dissolution kinetics of fibrin gels crosslinked by a microbial transglutaminase.
    Author: Sun Y, Giraudier O, Garde VL.
    Journal: Biopolymers; 2005 Apr 05; 77(5):257-63. PubMed ID: 15700298.
    Abstract:
    Various fibrin gels were prepared with a microbial transglutaminase under miscellaneous conditions. The gels were characterized through their rheological properties. The influence of fibronectin addition and that of covalent bonding on the viscoelastic characteristics were evaluated. Gel elasticity is proportional to fibrinogen concentration but shows a nonlinear dependence on transglutaminase concentration. Additional crosslink of fibronectin in fibrin gels has no effect on the rheological character of the matrix. Dissolution kinetics in concentrated urea solutions evidences the role of covalent bonds on gel stability. The rheological properties and gel stability are discussed in relation with the enzyme-catalyzed covalent bonding. The microbial enzyme reactions are compared to those of FXIII and tissue transglutaminases.
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