Fig.Ā 4From: Computational inference of the structure and regulation of the lignin pathway in Panicum virgatum Substrate competition for a shared enzyme, combined with product inhibition. The accumulation of H lignin in the 4CL transgenic line calls for a regulatory mechanism that guides the flow towards the upper branch of the pathway. Direct activation or an inhibited inhibitor can achieve this result. Simulation results support the second optionBack to article page