Tyrosin Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R40:Verdacht auf krebserzeugende Wirkung.
S-S?tze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S22:Staub nicht einatmen.
Chemische Eigenschaften
L-Tyrosine is odorless and has a bland taste. L-Tyrosine is a nonessential amino acid, as it is synthesized in the human
body from phenylalanine. It is a precursor to epinephrine, norepinephrine and dopamine, three important neurotransmitters.
Occurrence
Reported found in white bread, macaroni, egg noodles, corn flakes, corn grits, oatmeal, wheat bran, wheat
flakes, shredded wheat, barley brown rice, rye flour, whole grain wheat flour, buttermilk, blue cheese, cheddar cheese, cottage cheese,
cream cheese, parmesan cheese, bacon, cured ham, frankfurters, pork sausage, canned red kidney beans, canned sweet corn, canned
peas, canned lima beans, canned potatoes, almonds, cashews, peanuts, dates, beef, lamb, veal, chicken and turkey.
Verwenden
L-Tyrosine is one of the 22 proteinogenic amino acids that are used by cells to synthesize proteins. L-Tyrosine is biologically converted from L-phenylalanine and is in turn is converted to L-DOPA and
further converted into the neurotransmitters: dopamine, norepinephrine, and epinephrine.
Definition
ChEBI: An optically active form of tyrosine having L-configuration.
Sicherheitsprofil
An experimental
teratogen. Experimental reproductive
effects. When heated to decomposition it
emits acrid smoke and irritating fumes.
l?uterung methode
Likely impurities are L-cysteine and the ammonium salt. L-Tyrosine is dissolved in dilute ammonia, then crystallised by adding dilute acetic acid to pH 5. Also, crystallise it from H2O or EtOH/H2O, and dry it at room temperature in a vacuum over P2O5. It sublimes at 235-240o/0.03mm with 99.2% recovery and unracemised [Gross & Gradsky J Am Chem Soc 77 1678 1955]. [Albert Biochem J 50 690 1952, Greenstein & Winitz The Chemistry of the Amino Acids J. Wiley, Vol 3 pp 2348-2366 1961, Beilstein 14 IV 2264.]
Tyrosin Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
