L-Leucin

Gefahreninformationscode (GHS)

• Bildanzeige (GHS)

  

• Alarmwort

  Warnung

• Gefahrenhinweise

  H315：Verursacht Hautreizungen.

  H319：Verursacht schwere Augenreizung.

  H335：Kann die Atemwege reizen.

• Sicherheit

  P271：Nur im Freien oder in gut belüfteten Räumen verwenden.

  P280：Schutzhandschuhe/Schutzkleidung/Augenschutz tragen.

L-Leucine Chemische Eigenschaften,Einsatz,Produktion Methoden

• S-Sätze Betriebsanweisung:

  S24/25:Berührung mit den Augen und der Haut vermeiden.

• Beschreibung

  Small, white, lustrous plates, or a white, crystalline powder, with a slightly bitter taste. One g dissolves in about 40 mL of water and in about 100 mL of acetic acid. It is sparingly soluble in alcohol, but is soluble in dilute hydrochloric acid and in solutions of alkali hydroxides and carbonates. ι-Leucine may be synthesized by bromination, followed by amination of isocaproic acid; via the acetamidomalonic ester; by isolation from gluten, casein, keratin; from hydantoin.

• Chemische Eigenschaften

  Leucine occurs as a white or almost off-white crystalline powder or shiny flakes.

• Chemische Eigenschaften

  L-Leucine is odorless and has a slightly bitter taste. L-Leucine is a branched-chain, essential amino acid that stimulates muscle protein synthesis.

• Occurrence

  Reported found as a constituent in proteins; also present in the free state in the human body

• Verwenden

  L-Leucine plays a vital role in hemoglobin formation, protein synthesis and metabolic functions. It assists the growth and repair of muscle and bone tissue. It is used in the treatment of amyotrophic lateral sclerosis - Lou Gehrig's disease. It prevents the breakdown of muscle proteins after trauma or severe stress and may be beneficial for individuals with phenylketonuria. It is also used as a food additive and flavor enhancer. Further, it is used to preserve muscle glycogen.

• Verwenden

  L-Leucine is an essential amino acid. L-Leucine acts as a nutrient signal to stimulate protein synthesis. It has also activates the mammalian target of rapamycin kinase that regulates cell growth.

• Verwenden

  L-Leucine is an essential amino acid. It is also considered to be a branched chain amino acid, along with L-Isoleucine and L-Valine. It is used as a cell culture media component in the commercial biomanufacture of therapeutic recombinant proteins and monoclonal antibodies.

• Definition

  ChEBI: The L-enantiomer of leucine.

• synthetische

  By bromination followed by amination of isocaproic acid; via the acetamidomalonic ester; by isolation from gluten, casein, keratin; from hydantoin.

• Vorbereitung Methode

  Leucine is produced microbially by incubating an amino-acidproducing microorganism including but not exclusive to Pseudomonas, Escherichia, Bacillus, or Staphylococcus in the presence of oxygen and a hydrocarbon. The nutrient medium should contain an inhibitory amount of a growth inhibitor that is a chemically similar derivative of leucine (e.g. methylallylglycine, a-hydrozinoisocaproic acid, or b-cyclopentanealanine) to inhibit the growth of the organism except for at least one mutant that is resistant to the inhibitory effect. The resistant mutant is then isolated and grown in the presence of oxygen and the hydrocarbon in the absence of the inhibitor. The mutant cells are then harvested and a nutrient medium is formed that includes a hydrocarbon as the sole source of carbon. Finally, the harvested cells are incubated in the medium in the presence of oxygen.

• Pharmazeutische Anwendungen

  Leucine is used in pharmaceutical formulations as a flavoring agent. It has been used experimentally as an antiadherent to improve the deagglomeration of disodium cromoglycate micro-particles and other compounds in inhalation preparations; and as a tablet lubricant. Leucine copolymers have been shown to successfully produce stable drug nanocrystals in water.

• Biochem/physiol Actions

  Leucine is a non-glucogenic, essential amino acid. It is a branched-chain amino acid that is a structural component of proteins. Leucine positively influences insulin release to eliminate toxic sugars out of the blood. The degradation of leucine leads to the formation of ketone bodies.

• Sicherheit(Safety)

  Leucine is an essential amino acid and is consumed as part of a normal diet. It is generally regarded as a nontoxic and nonirritant material. It is moderately toxic by the subcutaneous route.
  LD50 (rat, IP): 5.379 g/kg

• Lager

  Leucine is sensitive to light and moisture, and should be stored in an airtight container in a cool, dark, dry place.

• läuterung methode

  Likely impurities are isoleucine, valine, and methionine. Crystallise L-leucine from water by adding 4 volumes of EtOH. It sublimes at 180-188o/0.3mm with 99.1% recovery, and unracemised [Gross & Gradsky J Am Chem Soc 77 1678 1955]. [Greenstein & Winitz The Chemistry of the Amino Acids J. Wiley, Vol 3 p 2075-2094 1961, Kameda et al. J Pharm Soc Jpn 78 763 1958, Beilstein 4 IV 2738.]

• Inkompatibilitäten

  Leucine is incompatible with strong oxidizing agents.

• Regulatory Status

  Included in the FDA Inactive Ingredients Database (IV infusion; oral tablets). Included in nonparenteral medicines licensed in the UK.

L-Leucine Upstream-Materialien And Downstream Produkte

L-Leucin Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

Global(901)Suppliers

61-90-5, L-Leucine Verwandte Suche: