System Biosciences

GFP-Fusion HR Targeting Vector [GFP-pA-LoxP-EF1a-RFP-T2A-Hygro-pA-LoxP-MCS]

(No reviews yet) Write a Review
Usually Shipped in 5 Working Days
10 ug
Shipping Temperature:
Blue Ice/ Dry Ice
  • GFP-Fusion HR Targeting Vector [GFP-pA-LoxP-EF1a-RFP-T2A-Hygro-pA-LoxP-MCS]
  • GFP-Fusion HR Targeting Vector [GFP-pA-LoxP-EF1a-RFP-T2A-Hygro-pA-LoxP-MCS]


GFP-Fusion HR Targeting Vector [GFP-pA-LoxP-EF1a-RFP-T2A-Hygro-pA-LoxP-MCS]. Cat# HR220PA. Supplier: SBI System Biosciences


Tag any gene with GFP
Use the PrecisionX™ Gene Tagging HR Targeting Vector (GFP-pA-LoxP-EF1α-RFP-T2A-Hygro-pA-LoxP-MCS) to fuse GFP to any gene in the genome. Clone your homology arms into the two MCSs and use hygromycin selection and RFP-positive imaging to find integrants. After you’ve identified clones with your GFP-tagged gene, you can remove the selection cassette using the Cre-LoxP system (learn more about Cre-LoxP excision here).
Why use an HR targeting vector?
Even though gene knock-outs can result from DSBs caused by Cas9 alone, SBI recommends the use of HR targeting vectors (also called HR donor vectors) for more efficient and precise mutation. HR donors can supply elements for positive or negative selection ensuring easier identification of successful mutation events. In addition, HR donors can include up to 6-8 kb of open reading frame for gene knock-ins or tagging, and, when small mutations are included in either 5’ or 3’ homology arms, can make specific, targeted gene edits.
Choose the right HR Targeting Vector for your project

How It Works

At-a-glance—how to use an HR Targeting Vector to tag a gene

Figure 1. Tagging a gene using an HR Targeting Vector. Step 1: Cas9 creates a double-stranded break (DSB) in the genomic DNA at a site that is complimentary to the gRNA. Step 2: The DNA repair machinery is recruited to the DSB. In the presence of an HR Donor with homology to the region adjacent to the DSB (blue areas of the genomic and vector DNA) homologous recombination (HR) is favored over non-homologous end joining (NHEJ). The tag you’d like to fuse to a gene should lie outside of the two LoxP sites. Result: The HR event leads to insertion of the region of the HR Donor Vector between the two homology arms—your tag ends up fused your gene-of-interest and your selection cassette is integrated. To remove the selection cassette (leaving behind the tag and a single LoxP site), transiently express Cre recombinase.

Genome engineering with CRISPR/Cas9

For general guidance on using CRISPR/Cas9 technology for genome engineering, including the design of HR Targeting Vectors, take a look at our CRISPR/Cas9 tutorials as well as the following application notes:

CRISPR/Cas9 Gene Knock-Out Application Note (PDF) »
CRISPR/Cas9 Gene Editing Application Note (PDF) »
CRISPR/Cas9 Gene Tagging Application Note (PDF) »

View AllClose