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Recombinant full length protein corresponding to GFP.
The total IgG concentration has been determined to be 5 mg/ml. The specific IgG concentration is unknown. This product should be kept refrigerated at all times whilst in short term storage. Using sterilised equipment will reduce the risk of bacterial contamination.
ab290 is a highly versatile antibody that gives a stronger signal than other anti-GFP antibodies available. On Western blot the antibody detects the GFP fraction from cell extracts expressing recombinant GFP fusion proteins and has also been shown to be useful on mouse sections fixed with formalin. In Immunocytochemistry, the antibody gives a very good signal on recombinant YES-GFP chimeras expressed in COS cells (McCabe et al. 1999 and figure below). It is routinely used in Immunoprecipitation (IP) and IP-Western protocols and has been used successfully in HRP Immunohistochemistry at 1:200 on whole-mount mouse embryos. ab6556 is the purified version of this antibody (see Related Products).
This anti-GFP antibody recognizes the enhanced form of GFP as well.
Recognises EYFP (Yellow Fluorescent Protein (YFP), a genetic mutant of green fluorescent protein (GFP).
ab290 also detects venus YFP.
Our Abpromise guarantee covers the use of ab290 in the following tested applications.
The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
|Flow Cyt||1/50 - 1/300.
See Abreview section for protocols. Also, ab171870 - Rabbit polyclonal IgG, is suitable for use as an isotype control with this antibody.
|ELISA||Use at an assay dependent concentration.|
|ICC/IF||1/500 - 1/1000.|
|ChIP||Use at an assay dependent concentration.|
|IHC-FrFl||Use at an assay dependent concentration.|
|ChIP/Chip||Use 5 µg for 1 µg of chromatin.
See Abreviews section for protocols. Also see PubMed ID 17289569 for more information.
|Electron Microscopy||1/1000 - 1/4000.|
|IHC-FoFr||1/200 - 1/500.|
|ICC||1/200 - 1/1000.|
|IHC-P||1/500 - 1/1000. Perform heat mediated antigen retrieval via the microwave method before commencing with IHC staining protocol.|
|IHC-Fr||Use at an assay dependent concentration. Reported to work at dilutions up to 1/3000.|
|IP||Use at an assay dependent concentration. Use at 1µl per 10cm tissue culture dish (use 10µl protein A agarose CL4B to precipitate the immune complex).|
|WB||1/1000 - 1/2500.
It is recommended to use 12.5% SDS-PAGE and to transfer to PVDF membrane. Use 1x Blotto (or 3% BSA in PBS) for diluting and blocking. Use PBS in 3x 5min washing steps throughout the immunolabelling. Probe with ab290 at 1:1000 - 1:5000 dilution and use anti-rabbit-HRP secondary ab at 1:5000 dilution with ECL detection method. ab290 has been reported to work at 1:50,000 and dilutions around this range should be tested if high background is seen. Both incubation steps should be for 1hr at 22°C.
ab290 staining GFP in U2OS cells expressing TRF2-GFP fusion protein by ICC/IF (Immunocytochemistry/immunofluorescence). Cells were fixed with formaldehyde, permeabilized with NP40 and blocked with 3% BSA for 1 hour at 21°C. Samples were incubated with the primary antibody (1/1000 in PBS + 3% BSA) for 12 hours at 4°C. An Alexa Fluor® 488-conjugated goat anti-rabbit IgG polyclonal at a dilution of 1/500 was used as the secondary antibody.
Green - GFP.
Blue - DAPI.
ab290 immunoprecipitating GFP in HEK293 nuclear lysate expressing GFP. 20µg of lysate was incubated with primary antibody (1 µg/mg lysate) and matrix (Protein G) for 16 hours at 4°C in AFC low salt buffer. For western blotting ab290 (1/5000) was used to confirm successful immunoprecipation.
Lane 1: HEK293 nuclear lysate expressing GFP input.
Lane 2: IP of HEK293 nuclear lysate expressing GFP.
Lane 3: Cells with no GFP.
B - Frontal confocal projection through the brain showing CD8::GFP in the MB and nls.dsRED in the Kenyon cell nuclei. Some expression can be seen at lower levels in other regions of the brain. Scale bar = 200 μm.
C- Posterior view showing CD8::GFP localized to the calyx and nls.dsRED in the Kenyon cell nuclei.
Whole flies were fixed in PFAT/DMSO (4% paraformaldehyde in 1X PBS +0.1% Triton X-100+5% DMSO) for one hour then washed in 1X PBS. Brains were microdissected in 1X PBS then post fixed in PFAT/DMSO for 20 mins and stored in MeOH at -20°C. Following rehydration in PBT (1X PBS + 0.5% triton X-100) brains were blocked in 5% normal goat serum in PBT for two hours at room temperature. They were then incubated overnight at room temperature with the primary antibody rabbit anti-GFP (ab290, 1/20000) then incubated overnight at 4°C with secondary antibody (Alexa Fluor® 488-conjugated goat anti-rabbit IgG, 1/200) and mounted. For confocal microscopy, optical sections were taken with a Leica TCS SP5 DM6000B Confocal Microscope. Image stacks were taken at intervals of 1 μm and processed with Leica Application Suite Advanced Fluorescence (LAS AF) software.
ab290 staining GFP in GFP-transfected NIH3T3 cells. The cells were fixed with 4% formaldehyde (10min) and then blocked in 1% BSA / 0.3M glycine in 0.1%PBS-Tween for 1h. The cells were then incubated with ab290 at 1/200 dilution overnight at +4°C followed by incubation with ab150081, Goat Anti-Rabbit IgG H&L (Alexa Fluor® 488), for 1 hour, at 1μg/ml.
Under identical experimental conditions, when compared to the basal level of GFP expression in transfected NIH3T3 cells, the cells upon which ab290 was applied gave a stronger signal in the 488 channel, indicating that ab290 is binding to GFP and therefore eliciting signal amplification.
ab290 was also applied to non-GFP-transfected NIH3T3 cells, which produced no positive staining, indicating specificity for GFP. Nuclear DNA was labelled with 1.43μM DAPI (blue).
Immunofluorescence images showing similar localization of Yes-GFP (first 10 aa's of Yes PTK fused to the N-terminus of GFP) to full length Yes PTK. A: Distribution of Yes detected using mouse anti-Yes Ab followed by Texas Red-conjugated anti-mouse Ab. B: Chimeric GFP's detected using rabbit anti-GFP Ab (Abcam ab290) followed by FITC-conjugated anti-rabbit Ab.
Image kindly provided by L.G. Berthiaume. Taken from J. McCabe and L.G. Berthiaume, Functional Roles for Fatty Acylated Amino-terminal Domains in Subcellular Localization, Molecular Biology of the Cell 10:3771-3786, 1999
ab290 immunoprecipitate in human HEK293 cells transfected with Annexin1-GFP. 25µg of cell lysate was incubated with the primary antibody and matrix (Protein G) in 1% TX-100, 10% glycerol, 1X PBS for 16 hours at 4°C. For Western blotting an HRP conjugated HRP goat polyclonal to rabbit Ig was used at a dilution at 1/5000.
Lane 1: Lysate of HEK293 cells expressing Annexin1-GFP fusion protein.
Lane 2: IP with anti-GFP.
Lane 3: Not bound fraction.
This image is courtesy of an anonymous Abreview
Blocked with 5% milk for 1 hour at 23°C.
Incubated with the primary antibody for 16 hours at 4°C.
This image is courtesy of an Abreview submitted by S Houtman
Blocked with 5% milk for 1 hour at 20°C.
Incubated with the primary antibody for 18 hours at 4°C in TBS containing 2% milk and 1% Tween.
Predicted MW of Eml4 ~ 120 kDa.
Immunohistochemistry (Free Floating) analysis of mouse brain tissue sections labelling GFP with ab290. Tissue was fixed with 4% PFA, frozen 30 µm sections were blocked for 1 hour at room temperature with 10% normal goat serum + donkey anti-mouse IgG Fab fragments (0.1 mg/ml). Sections were incubated with the primary antibody at a dilution of 1/1000 in TBS + 0.25% Triton-X for 16 hours at 4°C. A Cy2®-conjugated donkey anti-rabbit IgG (H+L) at a dilution of 1/200 was used as the secondary antibody.
Image shows anti-NeuN (red), DAPI (blue), and anti-GFP staining of GFP-cre (green, yellow with NeuN colocalization).
ab290 staining dog hearts (Adv-GFP injection) tissue sections by IHC-P. Sections were PFA fixed and subjected to heat mediated antigen retrieval in citric acid (Ph6.0, 0.05% Tween20) prior to blocking with 10% serum for 30 mins at 37°C. The primary antibody was diluted 1/1000 in PBS and incubated with the sample for 1 hour at 25°C. A HRP-conjugated goat anti-rabbit IgG was used as the secondary antibody.
Flow cytometry analysis of paraformaldehyde-fixed human differentiated hNSCs cells prepared through accutase, quantifying GFP with ab290 diluted 1/300 incubated for 20 hours at 25°C. Permeableization was through 0.25% Triton X-100 in DPBS. Secondary was a polyclonal goat anti-rabbit Alexa Fluor® 488 at 1/500. The gating strategy was against undifferentiated stem cells (shown in white).