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DL-Threonin

DL-Threonine Struktur
80-68-2
CAS-Nr.
80-68-2
Bezeichnung:
DL-Threonin
Englisch Name:
DL-Threonine
Synonyma:
THREONINE;H-DL-THR-OH;DL-Thr;DT 5621;DL-Thr-OH;DL-Threonin;Radish Seed;DL-Threoine;Bucladesina;DL-Theronine
CBNumber:
CB4475055
Summenformel:
C4H9NO3
Molgewicht:
119.12
MOL-Datei:
80-68-2.mol

DL-Threonin Eigenschaften

Schmelzpunkt:
244 °C (dec.)(lit.)
Siedepunkt:
222.38°C (rough estimate)
alpha 
[α]D20 0±1.0゜ (c=6, H2O)
Dichte
1.3126 (rough estimate)
Brechungsindex
1.4183 (estimate)
storage temp. 
Store at RT.
L?slichkeit
Soluble in water, Insoluble in absolute alcohol and oils
pka
2.09(at 25℃)
Aggregatzustand
Powder
Farbe
White
Wasserl?slichkeit
200 g/L (25 ºC)
Merck 
14,9380
BRN 
1721647
LogP
-1.136 (est)
CAS Datenbank
80-68-2(CAS DataBase Reference)
NIST chemische Informationen
DL-Threonine(80-68-2)
EPA chemische Informationen
Threonine (80-68-2)
Sicherheit
  • Risiko- und Sicherheitserkl?rung
  • Gefahreninformationscode (GHS)
Kennzeichnung gef?hrlicher Xi
R-S?tze: 36/37/38
S-S?tze: 24/25-37/39-26
WGK Germany  3
TSCA  Yes
HS Code  29225000
Bildanzeige (GHS) GHS hazard pictograms
Alarmwort Warnung
Gefahrenhinweise
Code Gefahrenhinweise Gefahrenklasse Abteilung Alarmwort Symbol P-Code
H315 Verursacht Hautreizungen. Hautreizung Kategorie 2 Warnung GHS hazard pictogramssrc="/GHS07.jpg" width="20" height="20" /> P264, P280, P302+P352, P321,P332+P313, P362
H319 Verursacht schwere Augenreizung. Schwere Augenreizung Kategorie 2 Warnung GHS hazard pictogramssrc="/GHS07.jpg" width="20" height="20" /> P264, P280, P305+P351+P338,P337+P313P
H335 Kann die Atemwege reizen. Spezifische Zielorgan-Toxizit?t (einmalige Exposition) Kategorie 3 (Atemwegsreizung) Warnung GHS hazard pictogramssrc="/GHS07.jpg" width="20" height="20" />
Sicherheit
P261 Einatmen von Staub vermeiden.
P305+P351+P338 BEI KONTAKT MIT DEN AUGEN: Einige Minuten lang behutsam mit Wasser spülen. Eventuell vorhandene Kontaktlinsen nach M?glichkeit entfernen. Weiter spülen.

DL-Threonin Chemische Eigenschaften,Einsatz,Produktion Methoden

R-S?tze Betriebsanweisung:

R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.

S-S?tze Betriebsanweisung:

S24/25:Berührung mit den Augen und der Haut vermeiden.
S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.

Beschreibung

Threonine (abbreviated as Thr or T) is an α-amino acid with the chemical formula HO2CCH(NH2)CH(OH)CH3. Its codons are ACU, ACA, ACC, and ACG. This essential amino acid is classified as polar. Together with serine, threonine is one of two proteinogenic amino acids bearing an alcohol group (tyrosine is not an alcohol but a phenol, since its hydroxyl group is bonded directly to an aromatic ring, giving it different acid/base and oxidative properties). It is also one of two common amino acids that bear a chiral side chain, along with isoleucine.
The threonine residue is susceptible to numerous posttr anslational modifications. The hydroxy side-chain can undergo Olinked glycosylation. In addition, threonine residues undergo phospho rylation through the action of a threonine kinase. In its phosphorylated form, it can be referred to as phospho threonine.

Chemische Eigenschaften

White crystalline powder

Occurrence

Foods high in threonine include cottage cheese, poultry, fish, meat, lentils, Black turtle bean and Sesame seeds.
Racemic threonine can be prepared from crotonic acid by alphafunctionalization using mercury (II) acetate.

History

Threonine was discovered as the last of the 20 common proteinogenic amino acids in the 1930s by William Cumming Rose.

Verwenden

DL-Threonine is used as a polar essential amino acid. It serves as a precursor of glycine as well as used in the biosynthesis of proteins. Further, it is used for biochemical research. In addition to this, it is used as a nutrition enhancer.

Biosynthese

As an essential amino acid, threonine is not synthesized in humans, hence we must ingest threonine in the form of threoninecontaining proteins. In plants and microorganisms, threonine is synthesized from aspartic acid via α-aspartyl-semialdehyde and homoserine. Homoserine undergoes O-phosphorylation; this phosphate ester undergoes hydrolysis concomitant with relocation of the OH group. Enzymes involved in a typical biosynthesis of threonine include :
aspartokinase
β-aspartate semialdehyde dehydrogenase
homoserine dehydrogenase
homoserine kinase
threonine synthase.

Stoffwechsel

Threonine is metabolized in two ways:
It is converted to pyruvate via threonine dehydrogenase. An intermediate in this pathway can undergo thiolysis with CoA to produce acetyl-CoA and glycine.
In humans, it is converted to α-ketobutyrate in a less common pathway via the enzyme serine dehydratase, and thereby enters the pathway leading to succinyl-CoA.
.

DL-Threonin Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte


DL-Threonin Anbieter Lieferant Produzent Hersteller Vertrieb H?ndler.

Global( 388)Lieferanten
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Accela ChemBio Inc.
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80-68-2(DL-Threonin)Verwandte Suche:


  • DL-THREONINE, FREE OF ALLOTHREONINE
  • DL-THREONINE ALLO-FREE
  • DL-THREONINE ALLO-FREE CELL CULTURE*TEST ED
  • Dl-ThreonineForBiochemistry99+%
  • DL-Threonine,99%
  • DL-Threonine, 99.50%
  • (n)-2-amino-3-hydroxybutyric acid
  • DL-AMINO-HYDROXYBUTYRIC ACID
  • DL-ALPHA-AMINO-BETA-HYDROXYBUTYRIC ACID
  • ALLOTHREONINE, DL-(RG)
  • THREONINE(allo-free), DL-(RG)
  • DL-Threonin
  • dl-tthreonine
  • H-DL-Thr-OH (DL-Threonine)
  • DL-THREONINE extrapure CHR
  • DL-threonine, 99.5%
  • rac-(R*)-2-[(S*)-1-Hydroxyethyl]glycine
  • rac-Threonine
  • A-AMINO-B-HYDROXYBUTYRIC ACID
  • Radish Seed
  • DL-Theronine
  • DL-Threoine
  • DL-Threonine (contains DL-Allothreonine)
  • DL-Thr-OH
  • DL-Threonine
  • DL-Threonine (contains DL-Allothreonine)
  • DL-2-AMINO-3-HYDROXYBUTANOIC ACID
  • DL-2-AMINO-3-HYDROXYBUTYRIC ACID
  • ALPHA-AMINO-BETA-HYDROXYBUTYRIC ACID
  • DL-THREONINE
  • (+/-)-2-AMINO-3-HYDROXYBUTYRIC ACID
  • 2-AMINO-3-HYDROXYBUTYRIC ACID
  • DL-Threonicne
  • DL-Threonine≥ 99% (Titration)
  • THREONINE, DL-
  • (R*,S*)-2-AMINO-3-HYDROXYBUTYRIC ACID
  • DL-Threonine USP/EP/BP
  • dextro,laevo-threonine
  • (2S,3R)-rel-2-Amino-3-hydroxybutanoic acid
  • DL-Threonine 80-68-2
  • DL-Threonine, for biochemistry
  • DL-Thr
  • Bucladesina
  • DT 5621
  • H-DL-THR-OH
  • THREONINE
  • Melatonin Impurity 15(Melatonin EP impurity A)
  • 80-68-2
  • 72-19-5;80-68-2
  • CH3CHOHCHNH2COOH
  • BioChemical
  • Amino Acid Derivatives
  • Amino Acids and Peptides
  • Biochemicals and Reagents
  • Amino Acids
  • Specialty Synthesis
  • Peptide Synthesis
  • amino acid
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