391334

BES

ULTROL^® Grade, ≥99% dry basis (titration), zwitterionic N-substituted aminosulfonic acid buffer

• Synonyme(s) : BES, Free Acid, ULTROL^® Grade, N,N- bis-(2-Hydroxyethyl)-2-aminoethanesulfonic Acid
• Formule empirique (notation de Hill): C₆H₁₅NO₅S
• Numéro CAS: 10191-18-1
• Poids moléculaire : 213.25
• Numéro MDL: MFCD00007533
• Code UNSPSC : 12161700
• Nomenclature NACRES : NA.25

Propriétés

• Niveau de qualité: 100
• Essai: ≥99% dry basis (titration)
• Forme: solid
• Fabricant/nom de marque: Calbiochem^®
• Conditions de stockage: OK to freeze
• Couleur: white
• pKa (20 °C): 7.12
• Solubilité: water: 1 mg/mL
• Traces de cations: heavy metals: ≤1 ppm
• Conditions d'expédition: ambient
• Température de stockage: 15-25°C
• Chaîne SMILES: [S](=O)(=O)([O-])CC[N+H](CCO)CCO
• InChI: 1S/C6H15NO5S/c8-4-1-7(2-5-9)3-6-13(10,11)12/h8-9H,1-6H2,(H,10,11,12)
• Clé InChI: AJTVSSFTXWNIRG-UHFFFAOYSA-N

Description

Description générale

Absorbance (100 mM, 260 nm):≤0.05.

BES buffer is suitable for use in systems where a calcium phosphate-DNA complex formation is desirable (Absorbance: <0.05 at 260 nm, 100 mM). Chen and Okayama describe an improved transfection system for the stable transformation of cells with plasmid DNA using BES buffer. The slow formation appears to be the most critical factor contributing to the high efficiency of stable transformations. Has a pK_a of 7.12 at 20°C.

BES buffer is suitable for use in systems where a calcium phosphate-DNA complex formation is desirable. Chen and Okayama described an improved transfection system for the stable transformation of cells with plasmid DNA using BES buffer. The gradual formation of the calcium phosphate-DNA complex and its slow precipitation onto cells appears to be the most critical factor contributing to the high efficiency of stable transformations.

Avertissement

Toxicity: Standard Handling (A)

Reconstitution

Following reconstitution, store in the refrigerator (4°C). Stock solutions are stable for up to 2 weeks at 4°C.

Autres remarques

De Graeve, K.G., et al. 1994. J. Appl. Bacteriol. 76, 55.
Chen, C.A., and Okayama, H. 1988. Biotechniques6, 632.

Informations légales

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

ULTROL is a registered trademark of Merck KGaA, Darmstadt, Germany

Informations sur la sécurité

• Code de la classe de stockage: 11 - Combustible Solids
• Classe de danger pour l'eau (WGK): WGK 3
• Point d'éclair (°F): Not applicable
• Point d'éclair (°C): Not applicable