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| Voi/SKU | Disponibilità | Prezzo |
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2 x 10000 units | Per conoscere la disponibilità, visualizza il carrello | CHF 247.00 |
CHF 247.00
Per conoscere la disponibilità, visualizza il carrello
Servizio Tecnico
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Permettici di aiutartibiological source
bovine pancreas
recombinant
expressed in Pichia pastoris
form
lyophilized
specific activity
(>10,000 U/bottle according to Kunitz (+25°C; DNA as substrate).)
mol wt
39 kDa
packaging
pkg of 2 × 10,000 U
manufacturer/tradename
Roche
concentration
≥70-90%
technique(s)
protein extraction: suitable
color
white to light yellow
solubility
water: soluble
suitability
suitable for molecular biology
NCBI accession no.
UniProt accession no.
application(s)
sample preparation
foreign activity
Proteases, none detected, RNase, none detected
storage temp.
2-8°C
Gene Information
bovine ... DNASE1(282217)
General description
Properties: Double-strand-specific endonuclease that requires bivalent cations for maximal activity.
Activity: 10,000U/bottle according to Kunitz (+25°C; DNA as substrate).
Unit definition: One unit is the enzyme activity that causes an increase in the absorbance of 0.001 per minutes under assay conditions.
Activity: 10,000U/bottle according to Kunitz (+25°C; DNA as substrate).
Unit definition: One unit is the enzyme activity that causes an increase in the absorbance of 0.001 per minutes under assay conditions.
Degrades Single- and Double-Stranded DNA; Double Stranded activity requires bivalent cations for maximal activity.
Application
Features and Benefits
Contents
Lyophilizate
Lyophilizate
Preparation Note
Activator: The enzyme requires divalent cations for maximal activity. The specificity of the reaction depends on the nature of the cation used. In the presence of Mg2+ DNase I causes single-stranded nicks in dsDNA, while in the presence of Mn2+ the enzyme produces double-stranded breaks.
Storage conditions (working solution): Long-term Storage of the Dissolved Enzyme
The solvent generally recommended for DNase I is water. When DNase I is reconstituted in water, the solution can be kept for 2 days at 2 to 8 °C and for 1 month at -15 to -20 °C. For best results, prepare appropriate aliquots and avoid repeated freezing and thawing. However, for long-term storage, carefully dissolve DNase I in one of the buffers listed below. In buffer 1, the enzyme will be stable for several weeks. The enzyme will be stable for at least 18 months if it is dissolved in buffer 2, 3, or 4 and stored at the recommended temperatures.
Information note: Do not vortex the enzyme while dissolving!
Buffer 1: 20 mM Tris-HCl, 20 mM MgCl2, 5 mM CaCl2, 0.1 mM dithioerythritol, 0.1 mM EDTA, 50% (v/v) glycerol, pH 8. Store this solution at -15 to-25 °C; it will not freeze at this temperature and will be stable for several weeks.
Buffer 2: 20 mM Tris-HCl, 50 mM NaCl, 1 mM dithioerythritol, 100 μg/mL BSA, 50% glycerol (v/v), pH 7.6. Store this solution at -15 to -25 °C for up to 18 months; it will not freeze at this temperature.
Buffer 3: 20 mM Tris-HCl, 1 mM MgCl2, 50% (w/v) glycerol, pH 7.5. Store this solution at -15 to -25 °C for up to 18 months; it will not freeze at this temperature.
Buffer 4: 20 mM Tris-HCl, 1 mM MgCl2, pH 7.5. Aliquot in appropriate amounts (e.g., 10 μl), freeze the aliquots quickly on dry ice, and store at -60 °C or below for up to 18 months. Thaw only the amount needed for each experiment. Do not refreeze. Discard any leftover thawed solution.
Storage conditions (working solution): Long-term Storage of the Dissolved Enzyme
The solvent generally recommended for DNase I is water. When DNase I is reconstituted in water, the solution can be kept for 2 days at 2 to 8 °C and for 1 month at -15 to -20 °C. For best results, prepare appropriate aliquots and avoid repeated freezing and thawing. However, for long-term storage, carefully dissolve DNase I in one of the buffers listed below. In buffer 1, the enzyme will be stable for several weeks. The enzyme will be stable for at least 18 months if it is dissolved in buffer 2, 3, or 4 and stored at the recommended temperatures.
Information note: Do not vortex the enzyme while dissolving!
Buffer 1: 20 mM Tris-HCl, 20 mM MgCl2, 5 mM CaCl2, 0.1 mM dithioerythritol, 0.1 mM EDTA, 50% (v/v) glycerol, pH 8. Store this solution at -15 to-25 °C; it will not freeze at this temperature and will be stable for several weeks.
Buffer 2: 20 mM Tris-HCl, 50 mM NaCl, 1 mM dithioerythritol, 100 μg/mL BSA, 50% glycerol (v/v), pH 7.6. Store this solution at -15 to -25 °C for up to 18 months; it will not freeze at this temperature.
Buffer 3: 20 mM Tris-HCl, 1 mM MgCl2, 50% (w/v) glycerol, pH 7.5. Store this solution at -15 to -25 °C for up to 18 months; it will not freeze at this temperature.
Buffer 4: 20 mM Tris-HCl, 1 mM MgCl2, pH 7.5. Aliquot in appropriate amounts (e.g., 10 μl), freeze the aliquots quickly on dry ice, and store at -60 °C or below for up to 18 months. Thaw only the amount needed for each experiment. Do not refreeze. Discard any leftover thawed solution.
Tightly closed. Dry.
Other Notes
For life science research only. Not for use in diagnostic procedures.
One unit, according to Kunitz, is the enzyme activity that under assay conditions causes an absorbance increase at 260 nm of 0.001/minute in 1 ml. Volume activity is determined in 0.1 M sodium acetate, 5 mM MgSO4, pH 5.0.
Assay mixture: Calf thymus DNA (100 μg) is incubated with 20 to 50 U DNase I at +25 °C.
The increase in absorbance is measured at 260 nm.
Information Note: These conditions are used for the determination of activity,according to Kunitz, since the Kunitz assay results in high reproducibility and sensitivity. When using this enzyme for normal experimental purposes, Roche recommends using incubation buffers that are appropriate for a given application, e.g., as mentioned in the standard literature (Sambrook et al., Curr. Prot. Mol. Biol., etc.).
Assay mixture: Calf thymus DNA (100 μg) is incubated with 20 to 50 U DNase I at +25 °C.
The increase in absorbance is measured at 260 nm.
Information Note: These conditions are used for the determination of activity,according to Kunitz, since the Kunitz assay results in high reproducibility and sensitivity. When using this enzyme for normal experimental purposes, Roche recommends using incubation buffers that are appropriate for a given application, e.g., as mentioned in the standard literature (Sambrook et al., Curr. Prot. Mol. Biol., etc.).
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Questo articolo | |||
|---|---|---|---|
| description grade I, from bovine pancreas, expressed in Pichia pastoris | description - | description from bovine pancreas, expressed in Pichia pastoris | description from bovine pancreas |
| form lyophilized | form buffered aqueous glycerol solution | form solution | form dry powder (prepared from crystallized ribonuclease) |
| manufacturer/tradename Roche | manufacturer/tradename - | manufacturer/tradename Roche | manufacturer/tradename Roche |
| biological source bovine pancreas | biological source bovine pancreas | biological source bovine pancreas | biological source bovine pancreas |
| storage temp. 2-8°C | storage temp. −20°C | storage temp. - | storage temp. 2-8°C |
| solubility water: soluble | solubility - | solubility water: soluble | solubility - |
| packaging pkg of 2 × 10,000 U | packaging - | packaging pkg of 10,000 U | packaging pkg of 500 mg |
Parola di avvertenza
Danger
Avvertenze di sicurezza
Hazard Classifications
Resp. Sens. 1 - Skin Sens. 1
Classe di stoccaggio
11 - Combustible Solids
WGK
WGK 1
Punto di infiammabilità (°F)
does not flash
Punto di infiammabilità (°C)
does not flash
Codici di pericolo
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