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CRISPR/Cas9 Monoclonal Antibody [7A9]


For antibody-based studies in CRISPR/Cas9 genome editing and genetic engineering

Citations (15) | (1) | Write a Review
Western Blot: Shown are the results of WB on protein extracts from untransfected (A) and transfected (B) HEK293 cells using the Anti-CRISPR-Cas9 mAb.
Immunofluorescence: Hela cells were transiently transfected with an N-terminally Flag-tagged S. pyogenes Cas9 expression vector. The cells were stained with the Anti-Cas9 monoclonal antibody followed by anti mouse-AF488 coupled secondary antibody. Nuclei were counter-stained with Hoechst 33342.
Immunoprecipitation: HEK293T expressing N-terminally Flag-tagged S.pyogenes Cas9 were lysed 72 hours post transfection. Proteins were immunoprecipitated from 100 μg of whole cell lysate for 1H at 4
Application: ELISA, IF, IP, WB
Areas of Research: Other Antibodies
Clonality: Monoclonal
Conjugate: Unconjugated
Host: Mouse
Isotype: IgG1 Kappa
Purification: Protein G Purified
Reactivity: Species Independent
Trial Size Available: Yes
100% Guarantee: 6 months
Catalog No.SizePriceQty
A-9000-01010 µg $59.00 
A-9000-05050 µg $167.00 
A-9000-100100 µg $295.00 
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Product Overview

The discovery of CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats) and Cas9 (CRISPR associated system or CRISPR associated protein 9 nuclease) found in bacteria to work as a defense mechanism against foreign DNA has proven to be an invaluable tool to target and modify a genetic sequence in gene editing and genome engineering applications. The system, known as CRISPR/Cas9, allows for sequence-specific cleavage of a targeted genomic locus by delivering the RNA-guided nuclease (Cas9) and appropriate guide RNAs (gRNA) into a cell. In addition, Protospacer Adjacent Motif (PAM) sequence immediately following the specificity sequence is necessary for successful binding of the Cas9 nuclease.

1 mg/ml

Mouse monoclonal antibody raised against CRISPR/Cas9, clone 7A9, generated with synthesized peptide corresponding to sequence of Streptococcus pyogene (S. pyogenes) CRISPR-associated endonuclease Cas9/Csn1. This Anti-Cas9 mAb can detect CRISPR/Cas9 expression in target cells by WB, IF, IP, or ELISA to confirm and verify whether gRNA and Cas9 vectors are successfully transfected.

Recognizes both Cas9 and dCas9 (nuclease deficient Cas9)

Species Independent


Recombinant N-terminal fragment of S. pyogenes Cas9 protein expressed in E. coli.

PBS, 30% Glycerol

Store at 4°C for short term (1-2 weeks). For long term storage, aliquot and then store at −20°C. Avoid multiple freeze/thaw cycles.

Protein G Purified

Alternative Names 
Anti-Cas9, Anti-CRISPR, Anti-CRISPR/Cas9, CRISPR antibody, Cas9 antibody, Cas9 7A9, 7A9-3A3

WB (1:200-1:500), IP (2 µg/10^6 cells), IF (1:200-1:500), ELISA (1:1000-1:2000)

User Guide & MSDS

[User Guide]*
*Always use the actual User Guide that shipped with your product. Is the above file locked? You can also request user guides by emailing along with your contact information and institution name.

Product Citations

Taghbalout A et. al. (September 2019). Enhanced CRISPR-based DNA demethylation by Casilio-ME-mediated RNA-guided coupling of methylcytosine oxidation and DNA repair pathways. Nat Commun. 10(1):4296.

Moran JD et. al. (June 2019). SOX4 regulates invasion of bladder cancer cells via repression of WNT5a. Int J Oncol.

Taghbalout A et. al. (May 2019). Casilio-ME: Enhanced CRISPR-based DNA demethylation by RNA-guided coupling methylcytosine oxidation and DNA repair pathways bioRxiv.

Ajina R. et. al. et. al. (January 2019). SpCas9-expression by tumor cells can cause T cell-dependent tumor rejection in immunocompetent mice OncoImmunology.

Rossidis AC et. al. (October 2018). In utero CRISPR-mediated therapeutic editing of metabolic genes. Nat Med. 24(10):1513-1518.

Yarrington RM et. al. (September 2018). Nucleosomes inhibit target cleavage by CRISPR-Cas9 in vivo. Proc Natl Acad Sci U S A. 115(38):9351-9358.

Shane G McInally et al. et. al. (June 2018). Robust and stable transcriptional repression in Giardia using CRISPRi bioRxiv.

Ophinni Y et. al. (May 2018). CRISPR/Cas9 system targeting regulatory genes of HIV-1 inhibits viral replication in infected T-cell cultures. Sci Rep. 8(1):7784.

Haitao Chen et. al. (March 2018). Efficient genome editing of Magnetospirillum magneticum AMB-1 by CRISPR-Cas9 system for analyzing magnetotactic behavior bioRxiv.

Behler J et. al. (March 2018). The host-encoded RNase E endonuclease as the crRNA maturation enzyme in a CRISPR-Cas subtype III-Bv system. Nat Microbiol. 3(3):367-377.

Hu J et. al. (February 2018). A Non-integrating Lentiviral Approach Overcomes Cas9-Induced Immune Rejection to Establish an Immunocompetent Metastatic Renal Cancer Model Molecular Therapy - Methods & Clinical Development. 9(2018):203-210.

Li S et. al. (September 2017). One-Step piggyBac Transposon-Based CRISPR/Cas9 Activation of Multiple Genes Mol Ther Nucleic Acids.

Chew WL et. al. (September 2016). A multifunctional AAV-CRISPR-Cas9 and its host response. Nat Methods.

Fuller KK et. al. (August 2015). Development of the CRISPR/Cas9 system for targeted gene disruption in Aspergillus fumigatus. Eukaryot Cell.

Wang D et. al. (June 2015). Adenovirus-mediated somatic genome editing of Pten by CRISPR/Cas9 in mouse liver in spite of Cas9-specific immune responses. Hum Gene Ther.

Customer Reviews

Rating by s*********** Verified Purchase Reviewed on: Tuesday 23 June, 2015
Application Description
Western Blot detection of Cas9 protein expression in A. fumigatus Af293 transformed strains.

Procedural Details
For this membrane, I used 1:500 dilution of the Cas9 mAb in blocking buffer (0.1% PBST with 5% non-fat dry milk) and incubated the membrane overnight at 4 C. For my secondary antibody, I used 1:3000 dilution of goat anti-mouse IgG(H+L) HRP-conjugated antibody (Bio-Rad).

Lane 1: protein ladder (on membrane), lane 2: wild-type Af293, lanes 3-5: cas9 transformed Af293 #1-3; short and long exposure, gel loaded with 10 ug protein per well

Other Thoughts
Cas9 protein is the dominant signal when Cas9 is under a constitutive promoter. The 10 s exposure is quite clean, and I overexposed it to get a sense for what other non-specific proteins the Ab might be binding to.

Western blot, 10 second exposure and 3 min over-exposure of same gel
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