# Inhibition of Peroxidation Potential and Protein Oxidative Damage by Metal Mangifera Complexes
## 3 Results
### Inhibition of Peroxidation Potential and Protection against Protein Oxidative Damage
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**Signal**} & \multicolumn{5}{c}{**Sample**} \\ \cline{2-6}  & **MF** & **Metal/Ratio** & **Peak 2** & **Peak 3** & **Peak 4** \\ \hline \multirow{6}{*}{O-H\({}_{\text{str}}\)} & \multirow{6}{*}{3366.31} & Cu (1:2) & 3365.69 & 3366.14 & \multirow{6}{*}{3366.76} \\ \cline{3-3}  & & Zn (1:2) & 3366.57 & 3365.57 & \\ \cline{3-3}  & & Zn (1:3) & 3366.57 & 3365.57 & \\ \cline{3-3}  & & Se (1:2) & & 3366.70 & \\ \cline{3-3}  & & Se (1:3) & & 3366.70 & 3366.85 \\ \hline \multirow{6}{*}{C-H\({}_{\text{str}}\)} & \multirow{6}{*}{2971.68} & Cu (1:2) & 2940.07 & 2939.76 & \multirow{6}{*}{2943.07} \\ \cline{3-3}  & & Zn (1:2) & 2915.87 & 2939.53 & \\ \cline{3-3}  & & Zn (1:3) & 2915.87 & 2939.53 & \\ \cline{3-3}  & & Zn (1:3) & 2915.87 & 2939.53 & 2943.07 \\ \cline{3-3}  & & Se (1:2) & & 2939.20 & \\ \cline{3-3}  & & Se (1:3) & & 2939.20 & 2939.34 \\ \hline \multirow{6}{*}{C=O\({}_{\text{str}}\)} & \multirow{6}{*}{1648.39} & Cu (1:2) & 1648.62 & 1650.09 & \multirow{6}{*}{1651.31} \\ \cline{3-3}  & & Zn (1:2) & 1649.13 & 1651.31 & \\ \cline{3-3}  & & Zn (1:3) & 1649.13 & 1651.31 & 1651.34 \\ \cline{3-3}  & & Se (1:2) & & 1648.37 & \\ \cline{3-3}  & & Se (1:3) & & 1648.37 & 1648.87 \\ \hline \multirow{6}{*}{CH-CH\({}_{\text{str}}\)} & \multirow{6}{*}{1489.16} & Cu (1:2) & 1488.16 & 1495.18 & \multirow{6}{*}{1493.27} \\ \cline{3-3}  & & Zn (1:2) & 1487.94 & 1493.27 & \\ \cline{3-3}  & & Zn (1:3) & 1487.94 & 1493.27 & 1488.34 \\ \cline{3-3}  & & Se (1:2) & & 1487.16 & \\ \cline{3-3}  & & Se (1:3) & & 1487.16 & 1490.93 \\ \hline \multirow{6}{*}{C-O\({}_{\text{str}}\)} & \multirow{6}{*}{1255.37} & Cu (1:2) & 1255.86 & 1254.83 & \multirow{6}{*}{1255.86} \\ \cline{3-3}  & & Zn (1:2) & 1255.51 & 1254.81 & \\ \cline{3-3}  & & Zn (1:3) & 1255.51 & 1254.81 & 1255.86 \\ \cline{3-3}  & & Se (1:2) & & 1294.58 & \\ \cline{3-3}  & & Se (1:3) & & 1294.58 & 1254.86 \\ \hline \multirow{6}{*}{C-C\({}_{\text{str}}\)} & \multirow{6}{*}{1091.14} & Cu (1:2) & 1095.84 & 1095.94 & \multirow{6}{*}{1095.94} \\ \cline{3-3}  & & Zn (1:2) & 1095.35 & 1095.58 & \\ \cline{3-3}  & & Zn (1:3) & 1095.35 & 1095.58 & \\ \cline{3-3}  & & Zn (1:3) & 1095.35 & 1095.58 & 1095.19 \\ \cline{3-3}  & & Se (1:2) & & 1076.47 & \\ \cline{3-3}  & & Se (1:3) & & 1076.47 & 1095.49 \\ \hline \multirow{6}{*}{M-O\({}_{\text{str}}\)} & \multirow{6}{*}{1091.14} & Cu (1:2) & 817.8 & 818.1 & \multirow{6}{*}{817.8} \\ \cline{3-3}  & & Zn (1:2) & 818.3 & 818.6 & \\ \cline{3-3}  & & Zn (1:3) & 817.8 & 818.1 & 817.8 \\ \cline{1-1} \cline{3-3}  & & Se (1:2) & & 818.1 & \\ \cline{1-1} \cline{3-3}  & & Se (1:3) & & 817.6 & 817.8 \\ \hline \hline \end{tabular} Legend: MF: Mangiferrin, Metal/Ratio: Metal from salts employed in reactions/Stoichiometric molar ratio of reactants (metal saltMF), Peaks: Chromatographic peaks as per Table 1.  
\end{table} 
Table 3: Spectral analysis data of FT-IR spectra of mangiferin and metal–mangiferin complexes. Figure 2: FT-IR spectra of mangiferin and selenium (IV)-mangiferin complexes in the region between 800 and 1800 cm\({}^{-1}\). The appearance of bands at 817.6 cm\({}^{-1}\) for Peak 3, ratio 1:2 (**A**) and 817.8 cm\({}^{-1}\) for Peak 4, ratio 1:3 (**B**) indicated the formation of metal–oxygen bonds of Se (IV)-mangiferin complexes. The same occurred for all metal–mangiferin complexes described herein.