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 involved in the production of the stress neurotransmitters epinephrine and norepinephrine. Some researchers believe that, under stress, the body isn't able to make enough tyrosine from phenylalanine.