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NMRD showing per Gd relaxivity at 35 °C of Gd2-Pep-Gd2 (squares), Gd2-Gly2-Pep-Gd2 (triangles) and Gd2-T-Pep-Gd2 (circles) in A) pH 7.4 Tris buffer, B) human plasma, or C) bound to human fibrin. Solid lines are fits to the data as described in the text.
