AnE. colistrain that carries the cloned and modified ApoI gene from Arthrobacter protophormiae (C. Polisson).
High Fidelity (HF) Restriction Enzymes have 100% activity in rCutSmart Buffer; single-buffer simplicity means more straightforward and streamlined sample processing. HF enzymes also exhibit dramatically reduced star activity. HF enzymes are all Time-Saver qualified and can therefore cut substrate DNA in 5-15 with the flexibility to digest overnight without degradation to DNA. Engineered with performance in mind, HF restriction enzymes are fully active under a broader range of conditions, minimizing off-target products, while offering flexibility in experimental design.
NEB extensively performs quality controls on all standard and high-fidelity(HF) restriction enzymes. Examples of nuclease contamination studies for someof our HF restriction enzymes are shown below.
EcoRI, NotI, and BamHI from multiple suppliers were tested in reactionscontaining a fluorescent labeled single stranded, double stranded blunt,3’overhang or 5’ overhang containing oligonucleotides. The percent degradationis determined by capillary electrophoresis and peak analysis. The resolution isat the single nucleotide level.
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核糖核酸酶A是内切核糖核酸酶,可特异地攻击RNA上嘧啶残基的3'端,切割与相邻核苷酸形成的磷酸二酯键。反应终产物是嘧啶3'磷酸及末端带嘧啶3'磷酸的寡核苷酸。无辅因子及二价阳离子存在时,核糖核酸酶A的作用可被胎盘RNA酶抑制剂(B1ackburn et al.1977)或氧钒—核糖核苷复合物(Puskas et al.1982)所抑制。核糖核酸酶A用途生化研究,测定核酸的结构RNase 保护检测去除非... 查看更多>