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. Author manuscript; available in PMC: 2010 Nov 1.
Published in final edited form as: Prog Nucl Magn Reson Spectrosc. 2009 Nov 1;55(4):335–360. doi: 10.1016/j.pnmrs.2009.07.002

Figure 6.

Figure 6

Commonly used paramagnetic probes in solution NMR. Chelated, hydrophilic gadolinium(III) contrast agents: A. Gd-DOTA B. Gd-DTPA. Hydrophobic contrast agents: C. 16-Doxyl-stearic acid (16-DSA) D. 5-DSA. Thiol-reactive nitroxide-based paramagnetic tags: E. 1-Oxyl-2,2,5,5-tetramethylpyrroline-3-methylmethanethiosulfonate (MTSL) F. 1-Oyl-,2,2,5,5-tetramethylpyrrolidine-3-maleimide (3-Maleimido-PROXYL) G. 3-(2-Iodoacetamido)-PROXYL. Thiol-reactive metal chelation tags: H. MTS-EDTA. (Arrow indicates the chiral center which forms upon metal ion complexation) Fixed chirality thiol reactive chelation tags: I. N-[(R)-2,3-Bis[di(carboxymethyl)amino]propionyl]-S-mesyl-(R)-cysteine (R,R-2) J. N,N'-dithiodi(4,1-phenylene)bis-(S)-2,3-bis[di(tert-butoxycarbonylmethyl)amino] propanamide (ent-5). [334]