Biological Activity of Amines Dopamine is a neurotransmitter. -Epinephrine is a bioregulator. -Niacin,Vitamin B6,is an amine. -Alkaloids:nicotine,morphine,cocaine Amino acids Chapter 19 3Chapter 19 3 Biological Activity of Amines ▪ Dopamine is a neurotransmitter. ▪ Epinephrine is a bioregulator. ▪ Niacin, Vitamin B6 , is an amine. ▪ Alkaloids: nicotine, morphine, cocaine ▪ Amino acids