The House of Tudor was a royal house of Welsh and English origin, descended in the male line from the Tudors of Penmynydd.
Tyrosine (Tyr or Y) or 4-hydroxyphenylalanine is one of the 22 amino acids that are used by cells to synthesize proteins. It is a non-essential amino acid with a polar side group. Its codons are UAC and UAU.
Tyrosine is an amino acid that converts to norepinephrine with the help of vitamin B6 and vitamin C. Norepinephrine is a sympathetic nerve neurotransmitter that is the stimulus for your subconscious brain (hypothalamus and pituitary) to activate the production of thyroid hormone in the first place (TRH and TSH).