L5385
α-Lactalbumin from bovine milk
Type I, ≥85% (PAGE), lyophilized powder
Synonim(y):
Białko B syntazy laktozy, Bos d 4, alfa-laktoalbumina
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About This Item
Polecane produkty
pochodzenie biologiczne
bovine milk
Poziom jakości
typ
Type I
Próba
≥85% (PAGE)
Formularz
lyophilized powder
stężenie
≥85 % protein
metody
cell culture | mammalian: suitable
electrophoresis: suitable
zanieczyszczenia
calcium, tested
rozpuszczalność
H2O: soluble 10 mg/mL, clear to slightly hazy, colorless to faintly yellow
numer dostępu UniProt
temp. przechowywania
−20°C
informacje o genach
cow ... LALBA(281894)
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Opis ogólny
α-Lactalbumin is a small, globular, whey protein that has been found in all milk studied to date. It is a metalloprotein of approximately 14 kDa produced in the mammary glands.
Zastosowanie
α-Lactalbumin from bovine milk has been used as a supplement of basal medium for various cell cultures. It has also been used as a marker for sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE).
Działania biochem./fizjol.
α-Lactalbumin is the cheif protein in human milk. It consists of a single polypeptide chain with 8 cysteines which form disulfide bridges. α-Lactalbumin binds several metal ions, including calcium, which is thought to play a role in the regeneration of native α-lactalbumin from the reduced, denatured form. α-Lactalbumin also has a distinct zinc binding site that is thought to play a role in the binding of the lactose synthase complex. The mature protein consists of 123 amino acid residues (14 kD), and it has a three-dimensional structure with 1.7 Α° resolution, demonstrating four α-helices and a triple stranded antiparallel β-sheet.
Alters the substrate specificity of galactosyltransferase to increase the rate of lactose formation; the complex of galactosyltransferase and α-lactalbumin is called lactose synthase.
Alters the substrate specificity of galactosyltransferase to increase the rate of lactose formation; the complex of galactosyltransferase and α-lactalbumin is called lactose synthase. Site-directed mutagenesis of Asp87 or Asp88 to Ala completely abolishes the strong calcium binding affinity and reduces the stimulation of lactose synthase to <3.5% of the maximal rate.
Jakość
Calcium saturated. May have traces of ammonium sulfate and sodium phosphate
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Kod klasy składowania
11 - Combustible Solids
Klasa zagrożenia wodnego (WGK)
WGK 3
Temperatura zapłonu (°F)
Not applicable
Temperatura zapłonu (°C)
Not applicable
Środki ochrony indywidualnej
Eyeshields, Gloves, type N95 (US)
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