- Class of monoamines derived from the amino acid tyrosine
- Contains a six-sided catechol ring in the structure  
- Includes Dopamine, Epinephrine, and Norepinephrine

Catecholamine Neurotransmitters 

- Class of monoamines derived from amino acid tryptophan
- Contains a five-sided indole ring in the structure
- Includes Melatonin and Serotonin 

Indoleamine Neurotransmitters 

- Modified amino acids 
- Two principal classes: Catecholamine and Indoleamine neurotransmitters 

Rutgers University

- A neurotransmitter based on changes of a single amino acid (acetylcholine, serotonin, and dopamine)
- Monoamine neurotransmitters are amine neurotransmitters 

Amine Neurotransmitters

Breedlove, S. & Watson, N. (2017). Behavioral neuroscience, eighth edition. Oxford University Press.

Behavioral Neuroscience 8th Edition

- First neurotransmitter to be identified
- Cholinergic neurons use acetylcholine and are essential to learning and memory 

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