How to read a metabolic atlas
A metabolic map is a projection of a reaction hypergraph: compounds participate in events, and events—not decorative line crossings—create biochemical connections.
- 00Complete pictureterritories and arterial routes
- 01Color veilfunctional pathway families
- 02Pathway spineordered source events
- 03Event annotationcatalyst and participant context
- 04Molecular landmarkexact structure identity
A conventional arrow between two metabolite names can hide additional substrates, products and cofactors. The release model represents each reaction as its own node, then attaches every admitted input and output with a role and stoichiometric coefficient. This prevents a many-participant reaction from being mistaken for several independent pairwise conversions.
The overview level organizes pathway territories; the pathway level exposes reaction spines and primary compounds; the reaction level reveals full participants, catalysts, compartments and citations. Moving between these levels changes visual density, not the underlying biological assertion.
Small, frequently reused compounds can create nonsensical graph shortcuts. ATP, water, protons, nicotinamide cofactors and free CoA remain visible in reaction detail but are excluded as intermediate waypoints by the default route finder. A route therefore follows source-defined reaction direction without turning every ATP-using reaction into a neighbor.
A pulsing route encodes ordered traversal only. Its speed is intentionally uniform and carries no information about flux, concentration, thermodynamic force or tissue abundance.
Ideas to carry into the map
- Reactions are hypergraph nodes.
- Semantic zoom changes detail, not evidence.
- Currency compounds stay visible but do not create route shortcuts.
- Animated traversal is not measured flux.