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. 2022 Oct 7;61(41):16458–16467. doi: 10.1021/acs.inorgchem.2c02690

Figure 3.

Figure 3

High-field region of anisotropic X-band EPR spectra recorded at pH and 120 K in the systems of an aqueous solution containing (A) [VIVO(malt)2(H2O)], (B) BMOV/HEWL 2/1, (C) BMOV/HSA 2/1, and (D) BMOV/MeIm 1/4. The V concentration is always 1.0 mM. The MI = 7/2 resonance of [VIVO(malt)2(H2O)] is indicated with I, of HEWL–[VIVO(malt)2] with II, of cis-[VIVO(malt)2(HSA-His)] with IIIa, and of cis-[VIVO(malt)2(MeIm)] with IIIb. The coordination of the two maltolato ligands is (equatorial–equatorial) and (equatorial–axial), and the fourth equatorial donor is a water-O for I, an Asp/Glu-COO– or an Asn/Gln-CO for II, and a His-N or an imidazole-N for IIIa and IIIb.