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. 2003 Apr 28;100(10):5766–5771. doi: 10.1073/pnas.1037676100

Figure 3.

Figure 3

(a) An exploded view of the heme distal cavity in an orientation highlighting hydrogen bonds from cyanide to TyrCD1-36 and TrpG8-88, and the TyrB10-23—TyrCD1-36 covalent bond. (b) Stereo view of the distal site cavity in cyano-met trHbO, seen from the solvent side. The CD region (Upper Right) is shown in the two observed conformations (gray and purple). Hydrogen bonds stabilizing water molecules W1 and W2 are dashed. The cyanide ligand is drawn in cyan; key residues are labeled with their topological positions.