Table 2.

Binding affinity and hydrogen bond in complex superoxide dismutase-compounds

Ligand	Binding affinity (kcal/mol)	Residues binding at ligand-protein complex
		Hydrogen interaction	Hydrophobic interaction
Ursolic acid	−5.4	Glu100	Lys30, Lys23, Lys3
Quercetin	−5.2	Glu21, Glu100, Lys23	Thr2, Gln22, Lys30, Val29
Naphthalene-catechol	−7.1	Glu100, Pro28, Lys23	Glu21, Trp32