Not CRISPR data: the image illustrates antibody quality for visualizing CRISPR experiment results.
Not CRISPR data: the image illustrates antibody quality for visualizing CRISPR experiment results.
Ref-1 Double Nickase Plasmid (h): sc-400932-NIC
- Target species: human
- 20 µg of transfection-ready, purified plasmid DNA; Suitable for up to 20 transfections
- Ref-1 Double Nickase Plasmid (h) consists of a pair of plasmids each encoding a D10A mutated Cas9 nuclease and a target-specific 20 nt guide RNA (gRNA) designed to knockout gene expression with greater specificity than its CRISPR/Cas9 KO counterpart
- Paired gRNA sequences are offset by approximately 20 bp to allow for specific Cas9-mediated double nicking of the genomic DNA, which mimics a DSB
- One plasmid in the pair contains a puromycin-resistance gene for selection; the other plasmid in the pair contains a GFP marker to visually confirm transfection
- Ref-1 Double Nickase Plasmid (h) and Ref-1 Double Nickase Plasmid (h2) encode distinct paired gRNA designs targeting APEX1. One or both designs may be available
- Following transfection, gene knockout efficiency can be assayed by WB, IF or IHC using antibody: Ref-1 Antibody (C-4): sc-17774
Ordering Information
| Product Name | Catalog # | UNIT | Price | Qty | FAVORITES | |
Ref-1 Double Nickase Plasmid (h) | sc-400932-NIC | 20 µg | $410.00 | |||
Ref-1 Double Nickase Plasmid (h2) | sc-400932-NIC-2 | 20 µg | $410.00 |
APEX1 encodes the human redox factor-1 (Ref-1), a multifunctional protein that integrates DNA base excision repair with redox regulation of transcription factors. As the major apurinic/apyrimidinic endonuclease, APEX1 processes abasic sites generated by oxidative damage and alkylation, coordinating repair synthesis and maintenance of genome stability. Ref-1 also modulates the DNA-binding activity of factors such as NF-κB, AP-1, HIF-1α, and p53, linking cellular redox state to stress-response transcriptional programs. Dysregulated APEX1/Ref-1 activity has been associated with altered oxidative stress handling, inflammatory signaling, and genomic instability observed across diverse disease-relevant contexts, including cancer and neurodegeneration.
Ref-1 Double Nickase Plasmid (h) consists of a matched pair of plasmids engineered for high-specificity editing of the APEX1 locus in human cell lines. Each plasmid expresses a Cas9 D10A nickase and a distinct sgRNA targeting opposite DNA strands within APEX1. When directed to adjacent sites on opposite DNA strands, the two nickases generate offset single-strand nicks that together produce a staggered double-strand break, requiring coordinated on-target activity from both guides. The resulting DNA break is resolved by endogenous cellular repair pathways, most commonly through non-homologous end joining (NHEJ), leading to insertions or deletions that disrupt APEX1 function. By requiring dual sgRNA engagement at the target locus, the double nicking approach enhances editing specificity and provides a complementary CRISPR strategy for applications where additional control over targeting precision is desired.
To support efficient identification of edited cells, one plasmid encodes GFP for fluorescent visualization of transfected populations, while the companion plasmid carries a puromycin resistance gene for antibiotic selection. Together, these features support efficient enrichment of co-transfected populations and simplify the validation of APEX1-disrupted clones.
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.