GFP-Trap® MA Kit

Details for Product No. ABIN1889492, Supplier: Log in to see
  • green fluorescent protein
  • gfp
Aequorea victoria
Camelid (Camelidae)
Antibody Type
Recombinant Antibody
Magnetic Agarose Beads
Affinity Measurement (AM), Chromatin Immunoprecipitation (ChIP), Enzyme Activity Assay (EAA), Immunoprecipitation (IP), Mass Spectrometry (MS), Protein Complex Immunoprecipitation (Co-IP), Pull-Down Assay (Pull-Down), Purification (Purif)
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Purpose GFP-Trap® is a high quality GFP-binding protein coupled to a monovalent matrix (magnetic agarose beads) for biochemical analysis of GFP fusion proteins and their interacting partners.
Brand GFP-Trap®
Sample Type Cell Extracts
Specificity Binding capacity: 10 µl GFP-Trap®_MA slurry binds 3 - 4 µg of GFP
Cross-Reactivity (Details) GFP-Trap® specifically binds to eGFP, wtGFP, GFP S65T, TagGFP, eYFP, YFP, Venus, Citrin, CFP. No binding to proteins derived from DsRed, all RFPs and TurboGFP can be detected.
Characteristics Antibodies - extremely powerful tools in biomedical research - are large complex molecules (~ 150 kDa) consisting of two heavy and two light chains. Due to their complex structure, the use of antibodies is often limited and hindered by batch-to-batch variations.

Camelidae (camels, dromedaries, llamas and alpacas) possess functional antibodies devoid of light chains, so-called heavy chain antibodies (hcAbs). hcAbs recognize and bind their antigens via a single variable domain (VHH). These VHH domains are the smallest intact antigen binding fragments (~ 13 kDa).

Nano-Traps are based on single domain antibody fragments (VHHs) derived from alpaca.
Components GFP-Trap® coupled to magnetic agarose beads
Lysis buffer (CoIP) 40 mL
10x RIPA buffer 2 mL
Dilution buffer 150 mL
Wash buffer 40 mL
Elution buffer 3 mL
Alternative Name GFP
Background The green fluorescent protein (GFP) and variants thereof are widely used to study the subcellular localization and dynamics of proteins. GFP fusion proteins can be expressed in different cell types at different expression levels by transient or stable transfection. Transient expression may provide quick informative results, however, in many cases it is necessary to generate stable cell lines that express the GFP fusion protein of interest at a level similar to the one of the endogenous protein. Quantification of GFP fusion proteins in cells can be tricky since existing methods, like fluorescence microscopy or Western Blotting, are often shows insufficient signal to noise ratios or high signal variabilities .
Research Area Tags/Labels
Application Notes Green fluorescent proteins (GFP) and variants thereof are widely used to study protein localization and dynamics. For biochemical analyses including mass pectroscopy and enzyme activity measurements these GFP-fusion proteins and their interacting factors can be isolated fast and efficiently (one step) via Immunoprecipitation using the GFP-Trap®. The GFP-Trap®_A enables purification of any protein of interest fused to GFP.

Particle size ~ 40 µm

Assay Time 1.5 h
  • Robust and versatile tool for biochemical analyses of GFP-fusion proteins
  • Short incubation times (5 - 30 min)
  • Quantitative isolation of fusion proteins and transiently bound factors from cell extracts or organelles
  • Low unspecific binding
  • No contaminating heavy and light chains of conventional antibodies
  • Applicable in Chromatin Immunoprecipitation (ChIP)
Sample Collection Harvest cells:
For one immunoprecipitation reaction the use of 10^6 - 10^7 mammalian cells (approx. one 10 cm dish) expressing a GFP-tagged protein of interest is recommended. To harvest adherent cells, aspirate growth medium, add 1 ml ice-cold PBS to cells and scrape cells from dish. Transfer cells to a pre-cooled tube, spin at 500 g for 3 min at +4°C and discard supernatant. Wash cell pellet twice with ice-cold PBS, gently resuspending the cells.

Lyse cells
  • 1. Resuspend cell pellet in 200 µL ice-cold lysis buffer by pipetting or using a syringe.
    note: Supplement lysis buffer with protease inhibitors and 1 mM PMSF (not included). optional for nuclear/chromatin proteins: Use RIPA buffer supplemented with 1 mg/mL DNase, 2.5 mM MgCl2, protease inhibitors and 1 mM PMSF (not included).
  • 2. Place the tube on ice for 30 min with extensively pipetting every 10 min.
  • 3. Centrifuge cell lysate at 20.000x g for 10 min at +4°C. Transfer lysate to a pre-cooled tube. Add 300 µl dilution buffer to lysate. Discard pellet.
    note: At this point cell lysate may be put at -80°C for long-term storage. optional: Add 1 mM PMSF and protease inhibitors (not included) to dilution buffer

We recommend that during incubation with the beads the final concentration of detergents does not exceed 0.2% to avoid unspecific binding to the matrix. If required, use more dilution buffer to dilute the supernatant accordingly.
Assay Procedure

Equilibrate beads

  • 4. Vortex GFP-Trap®_MA beads and pipette 25 µL bead slurry into 500 µL ice-cold dilution buffer. Magnetically separate beads until supernatant is clear. Discard supernatant and repeat wash twice.

Bind proteins:
  • 5. Add diluted lysate (step 3) to equilibrated GFP-Trap®_MA beads (step 4). If required, save 50 µL of diluted lysate for immunoblot analysis. Tumble end-over-end for 1 hour at 4°C.
  • 6. Magnetically separate beads until supernatant is clear. If required, save 50 µL supernatant for immunoblot analysis. Discard remaining supernatant.

Wash beads:
  • 7. Resuspend GFP-Trap®_MA beads in 500 µL dilution buffer. Magnetically separate beads until supernatant is clear. Discard supernatant and repeat wash twice.
    optional: Increase salt concentration in the second washing step up to 500 mM.

Elute proteins:
  • 8. Resuspend GFP-Trap®_MA beads in 100 µL 2x SDS-sample buffer.
  • 9. Boil resuspended GFP-Trap®_MA beads for 10 min at 95°C to dissociate immunocomplexes from GFP-Trap®_MA beads. The beads can be magnetically separated and SDS-PAGE is performed with the supernatant.
  • 10. optional instead of steps 8 and 9: elute bound proteins by adding 50 µl 0.2 M glycine pH 2.5 (incubation time: 30 sec under constant mixing) followed by magnetic separation. Transfer the supernatant to a new tube and add 5 µL 1M Tris base pH 10.4 for neutralization. To increase elution efficiency this step can be repeated.

Restrictions For Research Use only
Buffer Storage buffer: 20 % EtOH
Handling Advice Do not freeze.
Storage 4 °C
Expiry Date 12 months
Supplier Images
Immunoprecipitation (IP) image for GFP-Trap® MA Kit (ABIN1889492) Comparison of GFP-Trap® with conventional mono- and polyclonal antibodies: Immunoprec...
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