Tyrosine

Tyrosine is a precursor to the neurotransmitter dopamine. It is converted to L-DOPA by the enzyme tyrosine hydroxylase.

It is also a precursor to the thyroid hormones triiodothyronine (T3) and thyroxine (T4)

Tyrosine and its precursor phenylalanine are required for the synthesis of coenzyme Q10