Specialized Rolls of Amino Acids
Nature adapts materials & processes that already exist to new functions.
- Chemical messengers: neurotransmitters
- glycine, dopamine (tyrosine product), g-aminobutyric acid (GABA, decarboxylation of glutamate)
- Histamine (decarboxylation of histidine) mediator of allergic reactions
- Thyroxine (a tyrosine product) iodine-containing thyroid hormone