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3D model of Ls7β‐HSDH built employing the entire structure of 7β‐HSDH from Collinsella aerofaciens (PDB code 5GT9) as a template: the homodimeric quaternary structure (a) is conserved. The hypothetical binding mode of NADH (b) is primary due to the side chains of D19 and D40 to the 3′ and 2′‐OH groups of ribose, respectively.
