DNase I Solution (2500 U/mL)
DNase I Solution (2500 U/mL)
Thermo Scientific™

DNase I Solution (2500 U/mL)

Thermo Scientific DNase I removes unwanted DNA from cell lysates to improve protein extraction efficiency.Features of Thermo Scientific DNase I:•Read more
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Catalog number 90083
Price (USD)
131.00
Each
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Price (USD)
131.00
Each
Add to cart
Thermo Scientific DNase I removes unwanted DNA from cell lysates to improve protein extraction efficiency.

Features of Thermo Scientific DNase I:

• Degrades and removes unwanted DNA from samples
• Cleaves both single-stranded and double-stranded DNA
• Compatible with Thermo Scientific Pierce Cell Lysis Reagents
• Reduces viscosity of bacterial lysates (protein extracts) to facilitate pipetting

Deoxyribonuclease I (DNase I) is a single, glycosylated polypeptide that degrades unwanted single- and double-stranded DNA. The enzyme works by cleaving DNA into 5' phosphodinucleotide and small oligonucleotide fragments. DNase I is commonly added to cell lysis reagents to remove the viscosity caused by the DNA content in bacterial cell lysates or to remove the DNA templates from RNAs produced by in vitro transcription. This grade of DNase is sufficient for protein work. Use RNase-free DNase for any application requiring the digestion of DNA in which it is crucial to avoid damage to RNA.

General information about the use of DNase I:

• Calcium ions are required for activity of DNase I. Trace amounts of Ca++ may be present at high enough concentration for DNase I to be active, however use of EGTA or calcium-free buffers can reduce DNase I activity to undetectable levels.
• High levels (i.e., 100 mM) of monovalent ions such as Na+ and K+ will decrease DNase I activity
• DNase I is inactivated by heating to 65°C for 10 minutes
• Kunitz unit: 1 Kunitz unit is the amount of enzyme required to cause an increase of 0.001 A260nm/min/mL at 25°C in 0.1M NaOAc, pH 5.0 due to degradation of highly polymerized DNA
• Degradation assay units: 1 unit is defined as the amount of enzyme required to completely degrade 1 μg of plasmid DNA in the 10 minutes at 37°C in 10 mM Tris·HCl, pH 7.5, 50 mM MgCl2, 13 mM CaCl2.

Specifications:

• Quantity: 0.5 mL
• Concentration: ≥ 2500 units/mL
• Unit definition: 1 unit is defined as the amount of enzyme required to produce an increase in absorbance at 260nm of 0.001/min/mL at 25°C of highly polymerized DNA.
• Visual: Clear, colorless liquid, free of insoluble material
• Formulation: DNase I in 10 mM Tris-HCl pH 7.5, 10 mM CaCl2, 10 mM MgCl2

Related Products
DNase I Solution (1 unit/μL), RNase-free
For Research Use Only. Not for use in diagnostic procedures.
Specifications
Product TypeCell Lysis Enzyme
FormLiquid
EnzymeDNase
Quantity0.5 mL
Unit SizeEach
Contents & Storage
Store at -20°C

Frequently asked questions (FAQs)

How much B-PER Reagent should I use for large-scale preps?

Using 1 L of E.coli culture with an OD600 of approximately 2 will give approximately 8 grams wet cells. For 8 g cells, use 40-50 mL of B-PER Reagent.

Find additional tips, troubleshooting help, and resources within our Protein Purification and Isolation Support Center.

Can you explain how the B-PER Bacterial Protein Extraction Reagent lyses cells?

The B-PER Reagent solution contains a proprietary, mild, non-ionic detergent in 20 mM Tris-HCl, pH 7.5. It effectively disrupts cells and solubilizes native or recombinant proteins without denaturation. The reagent creates holes in the cell membrane that will leak out cytosolic proteins. The sample may become very viscous when the bacterial chromosome is released. We recommend adding DNAse I (Cat. No. 90083) to the reagent to reduce viscosity. For better lysis efficiency and if there are inclusion bodies, we recommend adding Lysozyme (Cat. No. 90082) to the reagent. Alternatively, you may purchase the B-PER Bacterial Protein Extraction Reagent with Enzymes Kit (Cat. No. 90078 or 90079) that includes the B-PER Bacterial Protein Extraction Reagent, DNase I, and Lysozyme.

Find additional tips, troubleshooting help, and resources within our Protein Purification and Isolation Support Center.