How do you make a DNase stock solution?
Prepare 1M EDTA disodium salt dihydrate. Weigh out 3.72 g EDTA and place in 5 ml molecular biology grade water. Add a few NaOH pellets to get to pH 9 and dissolve EDTA (can warm to 45°C with stirring to aid in dissolution).
How do you dissolve DNase 1?
Dissolve 2 mg of crude pancreatic DNase I (Sigma or equivalent) in 1 ml of 50 mM NaCl, Tris-Cl (pH 7.5), 1 mM MgCl2. When the DNase I is dissolved, add 1 ml of glycerol to the solution and mix by gently inverting the closed tube several times. Take care to avoid creating bubbles and foam.
How do you reconstitute DNase Sigma?
Reconstitution. Reconstitute the lyophylizate in sterile double-distilled water (10 mg/ml); further dilution with PBS (phosphate buffered saline), HBSS (Hank′s Balanced Salt Solution) or medium.
How do you store DNase?
DNase I is supplied as 1 vial containing 20,000 units at a concentration of 50-375 U/µl. Store in freezer (-5°C to -30°C).
Can you refreeze DNase?
Do not refreeze; discard any leftover thawed solution. Handle all samples as if potentially infectious, using safe laboratory procedures.
Does DNase need magnesium?
DNase I requires activation through divalent metals; maximum activation is achieved with magnesium and calcium but manganese, cobalt, and zinc may also be used. If random cleavage or nicking is desired, magnesium ions should be used as an activator.
What does DNase do in solution with the cells?
A deoxyribonuclease (DNase, for short) is an enzyme that catalyzes the hydrolytic cleavage of phosphodiester linkages in the DNA backbone, thus degrading DNA.
Can you freeze DNase?
Freeze in aliquots of approximately 10 µl quickly on dry ice; store up to 18 months at −60°C or below. Thaw only the amount needed for each experiment. Do not refreeze; discard any leftover thawed solution.
How stable is DNase?
Storage/Stability DNase I retains activity for at least three years when stored at –20 °C. can lose ~20% activity. DNase I remains active in solution between pH 5 and 7 up to 60 °C for at least five hours.
How does DNase I work?
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.
How do you remove RNase from DNAse I recombinant DNA?
Important Note: Alternatively, DNase I recombinant, RNase-free can be inactivated and removed by phenol extraction according to standard protocols, e.g., Current Protocols in Molecular Biology. DNase I recombinant, RNase-free may be used to degrade DNA in applications that are sensitive to the presence of RNase.
What is deoxyribonuclease (DNase)?
Deoxyribonuclease (DNase) I Solution (1 mg/mL) is useful to reduce or prevent the clumping of concentrated and/or cryopreserved cell suspensions following thawing.
Is DNase I recombinant animal-free?
All material used during the production process of DNase I recombinant is non-animal sourced, resulting in an animal-free product. Heat inactivation: One unit DNase I recombinant, RNase-free is heat-inactivated by 10 minutes incubation at 75 °C.
