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Hydrogen bonds and miscellaneous (sulfur) interactions between the residues of HSA and the molecules of PpIX in the hemin site (A) and Sudlow’s Site 1 (B). Interactions between ligand and amino acids are visualized in dashed lines and colored according to their type (conventional and non-classical H-bonds are green and olive; the miscellaneous interaction is yellow). Ligands and are shown in the ball and stick representation, respectively.
