Biogenic amines are one of two broad classes of classical neurotransmitters (the other being amino acids) and include: acetylcholine, serotonin, histamine, and the catecholamines epinephrine, norepinephrine, and dopamine. Synthesis pathways for biogenic amines (in blue) follow solid arrows through enzymatic steps, while degradation steps follow the dashed arrows. Source: http://www.whatislife.com/reader2/Metabolism/pathway/Neurotransmitter.html c8d Not in BridgeDb?! Not in BridgeDb?! biogenic amine biosynthetic pathway PW:0001234 Pathway Ontology PubMed Neuroscience http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=neurosci&part=A405 2001 Purves, Dale Augustine, George J. Fitzpatrick, David Katz, Lawrence C. LaMantia, Anthony-Samuel McNamara, James O. Williams, S. Mark. dopamine degradation pathway PW:0002511 Pathway Ontology