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 used by the body to produce brain chemicals stimulated by amphetamines. Reduced stimulant effects of amphetamines were observed in individuals who had been made tyrosine deficient.5 It is possible that a dietary deficiency of tyrosine may reduce the effectiveness of amphetamines.