Fig. 2
From: Insight into metabolic pathways of the potential biofuel producer, Paenibacillus polymyxa ICGEB2008
Representation of the predicted flux distributions with nitrate (red arrows) and ammonia (blue arrows) nutrition. Thickness of arrows is proportional to flux values. The two main differences are the use of reactions producing NADH under nitrate nutrition and the employment of FHL as reductant valve during ammonia nutrition. Nitrate reduction is represented by two different processes in the model. Either nitrate is used as final acceptor in the electron transfer chain yielding nitrite, or as source for the NIRÂ +Â NAR reduction to ammonia