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.
There are two types of tyrosine derived hormones: thyroid hormone and catecholamines. Thyroid hormone is one of the most important in the body because it regulates the development of organs and metabolism. Norepinephrine and epinephrine are catecholamines. Both are stress hormones and are also neurotransmitters. They are part of the flight or fight response.