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 groups of hormones derived from the amino acid tyrosine: 1  Thyroid hormones are basically a double tyrosine with the critical incorporation of 3 or 4 iodine atoms. 2  Catecholamines include epinephrine and norepinephrine, which are used as both hormones and neurotransmitters.