2.5.1.16	spermidine synthase	raphe nucleus	mesencephalic raphe nucelus, highest levels of expression in nucleus accumbens, taenia tecta, cerebellar cortex, cerebral cortical layer I, hippocampus, hypothalamus, mesencephalic raphe nuclei, central and lateral amygdala, and the circumventricular organs	
2.6.1.42	branched-chain-amino-acid transaminase	raphe nucleus	-	
4.1.1.28	aromatic-L-amino-acid decarboxylase	raphe nucleus	-	
4.1.1.28	aromatic-L-amino-acid decarboxylase	raphe nucleus	of 36-h post-fertilization zebrafish embryos