DNA酶I

脱氧核糖核酸酶 I

D128589-2KU

2KU

重组

≥2 units/ul；来源于毕赤酵母；溶液

Bovine pancreatic deoxyribonuclease is an endonuclease which splits phosphodiester linkages, preferentially adjacent to a pyrimidine nucleotide yielding polynucleotides with free hydroxyl group at the 3' position and phosphate group at the 5' position. The average chain length of a limit digest is a tetranucleotide.用于从蛋白质样品中除去 DNA。 Deoxyribonuclease I from bovine pancreas has been used in a study to compare several procedures for reducing RNase contamination in preparations of DNase. Deoxyribonuclease I from bovine pancreas has also been used in a study to investigate the effect of the composition of sodium dodecyl sulfate preparations on the renaturation of enzymes after polyacrylamide gel electrophoresis. description： Bovine pancreatic deoxyribonuclease I produced recombinantly in yeast, Pichia pastoris, to decrease levels of contaminating RNase and eliminate potential pathogens associated with animal based materials. Bovine pancreas is a rich source of RNase A which is often found in many commercial DNase preparations. Producing DNase I by recombinant means in an organism with much lower levels of endogenous RNase greatly facilitates purification of an enzyme with undetectable levels of RNase. The processes involved in the production and isolation of recombinant DNase I are completely devoid of animal based components which eliminates the possibility of introducing animal derived pathogens into bioprocessing procedures. Animal Free/AF. Recombinant Bovine pancreatic deoxyribonuclease 1 produced in Pichia pastoris. Chromatographically purified. Free of animal derived components, RNases & proteases. A liquid preparation in 5mM Calcium Acetate, 4mg/ml glycine, pH 5.0 and 50% glycerol. Supplied with 10x reaction buffer. Storage Buffer : 5mM calcium acetate, 4mg/ml glycine, pH 5.0 and 50% glycerol. DNase I Reaction Buffer (10X): 500mM Tris-HCl, 10mM MgSO4, 1mM CaCl2, pH 7.8, provided. application： Recombinant DNase I is suitable for such applications as: • Removing genomic DNA from RNA preparations prior to RT-PCR • Degradation of DNA templates after transcription reactions • Removing unwanted DNA from samples prior to Northern blotting • Removing DNA during biopharma and bioprocessing procedures

DNase I 是一种内切酶，可作用于嘧啶附近的磷酸二酯键，生成末端带有 5′-磷酸的多核苷酸。在 Mg2+ 存在的情况下，DNAse I 可独立裂解 DNA 的每一条链，裂解位点是随机的。在 Mn2+ 存在的情况下，两条 DNA 链会在大致相同的部位被裂解。Mn2+、Ca2+、Co2+ 和 Zn2+ 等二价阳离子是该酶的活化剂。浓度为 5 mM 的 Ca2+ 能使酶稳定，防止蛋白水解。最佳 pH 值为 7 至 8。牛胰腺中的 DNAse I 由 A、B、C 和 D 四种色谱法可区分的成分组成，它们的摩尔比分别为 4:1:1。其中只有少量的 D。已知 2-巯基乙醇、螯合剂、十二烷基硫酸钠（SDS）6 和肌动蛋白7 可抑制酶的活性。

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