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. Author manuscript; available in PMC: 2015 Jun 1.
Published in final edited form as: Nat Chem. 2014 Nov 2;6(12):1044–1048. doi: 10.1038/nchem.2099

Figure 2.

Figure 2

Pyramid representation of reaction network with focus on a product molecule of interest (3D view in Supplementary Video 2); the initial reactants were H2, H2O, NH3, CH4 and CO. Compounds (C = teal, H = white, N = blue, O = red) are shown in spheres, and reactions (i.e. chemical equations) are indicated using colored arrows. Arrowheads indicate one side of the chemical equation, though reactions can occur in either direction. The chosen molecule (urea) is highlighted in red, and molecules directly involved in reactions with urea are highlighted in blue. Reactions more than one step removed from urea are mostly blurred out to show the high connectivity and complexity in the overall graph, with a single reaction highlighted (gray spheres, bottom left).