The Double Nickase Plasmid features a U6 promoter for sgRNA expression, a 20 nt targeting sequence, and a gRNA scaffold to guide Cas9n. It includes a CBh promoter for Cas9n (D10A) and puromycin resistance, GFP for transfection verification, and nuclear localization signals (NLS). The 2A peptide allows co-expression of Cas9n and Puro from a single promoter, enabling precise genome editing with reduced off-target effects.
The Double Nickase Plasmid features a U6 promoter for sgRNA expression, a 20 nt targeting sequence, and a gRNA scaffold to guide Cas9n. It includes a CBh promoter for Cas9n (D10A) and puromycin resistance, GFP for transfection verification, and nuclear localization signals (NLS). The 2A peptide allows co-expression of Cas9n and Puro from a single promoter, enabling precise genome editing with reduced off-target effects.
Cas9n Nickase gRNA Plasmid Targeting: Dual gRNA plasmids create single-strand nicks at precise DNA sequences for efficient genome editing using Cas9n Nickase.
This image illustrates the Cas9n Nickase mechanism used for precise genome editing. Two plasmids (Plasmid 1 and Plasmid 2) are shown, each containing a targeted DNA sequence. The system utilizes single-guide RNAs (sgRNA) to direct Cas9n Nickase to specific genomic locations, represented by the blue and pink DNA strands. The sgRNA scaffold aids in guiding Cas9n to the 20 nucleotide (nt) target sequence on the DNA. Cas9n makes single-strand cuts at NCC and NGG sites, enabling precise gene modifications without creating double-strand breaks.
The Double Nickase Plasmid features a U6 promoter for sgRNA expression, a 20 nt targeting sequence, and a gRNA scaffold to guide Cas9n. It includes a CBh promoter for Cas9n (D10A) and puromycin resistance, GFP for transfection verification, and nuclear localization signals (NLS). The 2A peptide allows co-expression of Cas9n and Puro from a single promoter, enabling precise genome editing with reduced off-target effects.
DNA pol θ双切酶质粒(h)和DNA pol θ双切酶质粒(h2)编码针对POLQ的不同配对gRNA设计。其中一种或两种设计可能均有提供
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DNA pol θ双切口酶质粒(h)
sc-407414-NIC
20 µg
$410.00
POLQ 编码 DNA 聚合酶 theta(Pol θ),这是一种高差错率的 A 家族聚合酶,同时还具有类解旋酶活性,并作为微同源介导的末端连接(MMEJ,亦称 theta 介导的末端连接)的核心介质。Pol θ 作用于 DNA 双链断裂和复制叉停滞部位,利用短微同源序列促进末端连接,从而影响基因组稳定性、复制应激耐受以及突变特征谱。该通路与经典非同源末端连接(c-NHEJ)和同源重组(HR)相互衔接,在 DNA 末端切除受损或 HR 能力不足的条件下,塑造修复通路的选择。POLQ 活性与表达的改变常在癌症生物学以及 DNA 修复缺陷状态相关的染色体重排与高突变现象研究中被重点关注。
DNA pol θ 双切酶质粒(h)由一对匹配的质粒组成,专为在 human 细胞系中对 POLQ 位点进行高特异性编辑而设计。每个质粒分别表达Cas9 D10A切口酶和针对POLQ内不同DNA链的独特sgRNA。当这两种切口酶被引导至相邻但位于DNA链相反侧的位点时,会产生错位的单链切口,从而共同形成错位双链断裂,这需要两个引导RNA在靶位点上协同发挥作用。由此产生的DNA断裂通过内源性细胞修复途径(最常见的是非同源末端连接(NHEJ))得到修复,从而导致插入或缺失,进而破坏POLQ的功能。通过要求双sgRNA在靶位点结合,双切口方法提高了编辑特异性,并为需要对靶向精度进行额外控制的应用提供了互补的CRISPR策略。