I've been researching neuromodulators and have taken a look at the Norepinephrine/Noradrenaline system.
The diagram of biosynthesis of Norepinephrine is presented in the wikipedia article:
The diagram appears to state that Dopamine gets converted to Norepinephrine , which gets converted to Epinephrine, and as a side effect, Homocysteine cycle gets advanced too (or is it involved?).
This article describes the homocysteine biosynthesis
I would like to understand what this means when two biosynthesis cycles are related like that. If I envision two cycles as connected gears, then turning one would turn the other, and if one is malfunctioning, so will the other. Is this a correct analogy?
What are the implications of the Homocysteine and Norepinephrine cycles touching each other? As far as I understand, Epinephrine(Adrenaline) is a stress related hormone, does this mean that stress also results in elevating the levels of Homocysteine ?
Thank you for your clarification!