Chemical Reaction Network

Stoichiometric matrix, null-space fluxes & steady-state concentrations

Network

dc/dt = S·v(c)
Steady state: S·v* = 0
S ∈ ℝ^{m×n} stoich. matrix
Flux modes: null(S)
Conservation: l^T·c = const
Σ stoich invariants
Flux balance analysis finds steady-state flux distributions satisfying S·v=0. The null space of S contains all valid flux modes. Living cells operate near steady state; FBA is foundational to metabolic engineering.