From: F2C2: a fast tool for the computation of flux coupling in genome-scale metabolic networks
Known flux coupling
i∽j
i ↔ = 0 j
i → = 0 j
j → = 0 i
k∽i
k∽j
k → = 0 j
j → = 0 k
k ↔ = 0 i
k ↔ = 0 j
k → = 0 i
k↦i
k↦j
i↦k
j↦k