Product nameAnti-GFP antibody [LGB-1]
See all GFP primary antibodies
DescriptionMouse monoclonal [LGB-1] to GFP
SpecificityThis antibody recognizes all forms of GFP from Aquorea victoria (i.e. GFP, EGFP, YFP and CFP). See Abreview for CFP immunoprecipitation.
Tested applicationsSuitable for: Flow Cyt, IP, ELISA, ICC/IF, WBmore details
Recombinant full length protein corresponding to Escherichia coli GFP.
Database link: P42212
- ICC/IF: GFP-transfected NIH3T3 cells
Storage instructionsShipped at 4°C. Upon delivery aliquot and store at -20°C or -80°C. Avoid repeated freeze / thaw cycles.
Storage bufferPreservative: None
Constituents: 50% Glycerol, PBS, pH 7.2
Concentration information loading...
PurityProtein A purified
Light chain typekappa
Our Abpromise guarantee covers the use of ab291 in the following tested applications.
The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
|Flow Cyt||Use at an assay dependent concentration.
ab170190 - Mouse monoclonal IgG1, is suitable for use as an isotype control with this antibody.
|IP||Use at an assay dependent concentration.|
|ELISA||Use at an assay dependent concentration.|
|ICC/IF||Use a concentration of 0.5 µg/ml.|
|WB||Use a concentration of 0.5 µg/ml. Detects a band of approximately 27 kDa (predicted molecular weight: 27 kDa).|
RelevanceFunction: Energy-transfer acceptor. Its role is to transduce the blue chemiluminescence of the protein aequorin into green fluorescent light by energy transfer. Fluoresces in vivo upon receiving energy from the Ca2+ -activated photoprotein aequorin.
Subunit structure: Monomer.
Tissue specificity: Photocytes.
Post-translational modification: Contains a chromophore consisting of modified amino acid residues. The chromophore is formed by autocatalytic backbone condensation between Ser-65 and Gly-67, and oxidation of Tyr-66 to didehydrotyrosine. Maturation of the chromophore requires nothing other than molecular oxygen.
Biotechnological use: Green fluorescent protein has been engineered to produce a vast number of variously colored mutants, fusion proteins, and biosensors. Fluorescent proteins and its mutated allelic forms, blue, cyan and yellow have become a useful and ubiquitous tool for making chimeric proteins, where they function as a fluorescent protein tag. Typically they tolerate N- and C-terminal fusion to a broad variety of proteins. They have been expressed in most known cell types and are used as a noninvasive fluorescent marker in living cells and organisms. They enable a wide range of applications where they have functioned as a cell lineage tracer, reporter of gene expression, or as a measure of protein-protein interactions. Can also be used as a molecular thermometer, allowing accurate temperature measurements in fluids. The measurement process relies on the detection of the blinking of GFP using fluorescence correlation spectroscopy.
Sequence similarities: Belongs to the GFP family.
Biophysicochemical properties: Absorption: Abs(max)=395 nm
Exhibits a smaller absorbance peak at 470 nm. The fluorescence emission spectrum peaks at 509 nm with a shoulder at 540 nm.
- GFP antibody
- Green fluorescent protein antibody
All lanes : Anti-GFP antibody [LGB-1] (ab291) at 0.5 µg/ml
Lane 1 : 5ng GFP
Lane 2 : 10ng GFP
Lane 3 : 25ng GFP
All lanes : Sheep anti-mouse IgG HRP conjugate at 1/5000 dilution
Predicted band size: 27 kDa
Observed band size: 27 kDa
Paraformaldehyde fixed COS-7 cells expressing Myr-N15-PAK2-EGFP construct (Vilas et al.(2006) PNAS 103, 6542). Myr-N15-PAK2-EGFP fluorescence is shown in green. Indirect immunofluorescenct detection of N15-PAK-EGFP using ab291 monoclonal LGB-1 anti-GFP at 0.05 ug/ml with chicken anti-mouse secondary antibody conjugated to Alexa594 diluted 1/500 is shown in red. Myr-N15-PAK2-EGFP is localized to membrane ruffles and perinuclear vesicular structures (likely Golgi,TGN or late endosomes).
ab291 at 6.7µg/mg lysate.
HEK293 Cell lysate at 300µg.Transfected with CFP-fused protein XXX in pECFP vector. Immunoprecipitation step using Protein G.
ab291 staining GFP in Dog MDCKII cells transfected with GFP by ICC/IF (Immunocytochemistry/immunofluorescence). Cells were fixed with paraformaldehyde, permeabilized with 0.5% TX100 and blocked with 5% serum for 20 minutes. Samples were incubated with primary antibody (1/250 PBS + 0.1% TX100 + 1% goat serum) for 16 hours at 4°C. An Alexa Fluor®546-conjugated Goat anti-mouse IgG polyclonal (1/500) was used as the secondary antibody. DAPI was used to stain nuclei. ab291 was used to assess electoporation efficiency of double transfected MDCKII cells.
ab291 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 ab291 at 1/200 dilution overnight at +4°C followed by incubation with ab150117, Goat Anti-Mouse 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 ab291 was applied gave a stronger signal in the 488 channel, indicating that ab291 is binding to GFP and therefore eliciting signal amplification.
ab291 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).
This product has been referenced in:
- Zhang L et al. A GABAergic cell type in the lateral habenula links hypothalamic homeostatic and midbrain motivation circuits with sex steroid signaling. Transl Psychiatry 8:50 (2018). Read more (PubMed: 29479060) »
- Crespo-Garcia S et al. Individual and temporal variability of the retina after chronic bilateral common carotid artery occlusion (BCCAO). PLoS One 13:e0193961 (2018). Read more (PubMed: 29547662) »