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. Author manuscript; available in PMC: 2019 Apr 22.
Published in final edited form as: Arch Biochem Biophys. 2013 Oct 23;544:87–95. doi: 10.1016/j.abb.2013.10.013

Fig. 4.

Fig. 4.

Active site structure of the canonical HemO and non-canonical IsdI. (A) Hydrogen bond network of the heme-HemO distal pocket. (B) Active site of heme-IsdG with the active site residues as labeled. Protein Data Bank (PDB) codes 1SK7 (HemO) 3LGM (IsdI).