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. 2016 Jan 20;12(1):e1004701. doi: 10.1371/journal.pcbi.1004701

Fig 1. The distinctive truncated hemoglobin structure.

Fig 1

(A) Typical fold of a trHb structure and the commonly used structural blocks (shown in different colors). (B) Schematic representation showing the three different ligand entry tunnels present in trHbs: Long Tunnel (in red), Short Tunnel G8 (in blue) and E7 Gate (in green). (C) Schematic representation of the five structural positions that define the active site in a typical trHb. The figure shows the heme group (grey), the bound oxygen ligand (red in balls and sticks) and the five key residues (shown as sticks).