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Schematic structure of albumin-(Gd-DTPA)35. The belt-like random coil represents the human albumin core structure with amino-containing side chains of the lysine residues (small sticks) to which Gd-DTPA (grey ovals) are covalently attached. The actual molecular weight of this macromolecule is 92 kDa, while its effective molecular weight is approximately 180 kDa with a measured hydrodynamic diameter of approximately 6 nanometers.
