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. Author manuscript; available in PMC: 2012 Aug 16.
Published in final edited form as: Biochemistry. 2011 Jul 15;50(32):6832–6840. doi: 10.1021/bi200788x

Figure 1.

Figure 1

Structures of the (A) O2-binding WT Tt H-NOX (1U55, chain A) in teal (15) and (B) a non-O2-binding H-NOX from Nostoc in magenta (14). Hemes and coordinating histidines as well as the distal pocket residue about the heme are shown in sticks. A global alignment of these two structures results in an RMSD of 1.88 Å (using Cα − Cα).