You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Thyroxine is synthesized from: and explain in detail?
In dopaminergic cells in the brain, tyrosine is conveed to levodopa by the enzyme tyrosine hydroxylase (TH).TH is the rate-limiting enzyme involved in the synthesis of the neurotransmitter dopamine.In the adrenal medulla, tyrosine is conveed into the catecholamine hormones norepinephrine (noradrenaline), and epinephrine.The thyroid hormones triiodothyronine (T3) and thyroxine (T4) in the colloid of the thyroid also are derived from tyrosine.