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Rabbit TrueBlot® Anti-Rabbit IgG HRP Accessory Reagents

Pubmed (89)
Catalog No. ABIN1589974
$215.00
Plus shipping costs $45.00 and $22.00 dry ice
200 μL ABIN1589974
200 μL ABIN1589974
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  • Reactivity
    Rabbit
    Host
    Mouse
    Clonality
    Monoclonal
    Conjugate
    HRP
    Application
    Immunoprecipitation (IP), Western Blotting (WB)
    Brand
    TrueBlot®
    Specificity
    Assay by Immunoelectrophoresis resulted in a single precipitin arc against anti-Rabbit Serum. Reactivity is observed against native Rabbit IgG by both Western blot and ELISA.
    Characteristics
    Rabbit IgG TrueBlot® is a unique horseradish peroxidase conjugated anti-rabbit IgG immunoblotting (second step) reagent. Rabbit IgG TrueBlot® enables detection of immunoblotted target protein bands, without hindrance by interfering immunoprecipitating immunoglobulin heavy and light chains. It is easy to generate publication-quality IP/Western Blot data with Rabbit IgG TrueBlot®, simply substitute the conventional HRP anti-rabbit IgG blotting reagent with Rabbit IgG TrueBlot® and follow the prescribed protocol for sample preparation and immunoblotting.

    Rabbit IgG TrueBlot® is ideal for use in protocols involving immunoblotting of immunoprecipitated proteins. TrueBlot preferentially detects the non-reduced form of rabbit IgG over the reduced, SDS-denatured form of IgG. When the immunoprecipitate is fully reduced immediately prior to SDS-gel electrophoresis, reactivity of Rabbit IgG TrueBlot® with the 55 kDa heavy chains and the 23 kDa light chains of the immunoprecipitating antibody is minimized thereby eliminating interference by the heavy and light chains of the immunoprecipitating antibody in IP/Western blotting applications. Applications include studies examining post-translational modification (e.g., phosphorylation or acetylation) or protein-protein interactions. Rabbit IgG TrueBlot may also be used for detection in immunoblotting assays that do not employ immunoprecipitation.
    Conjugation Name: HRP TrueBlot® ULTRA
    Purification
    Rabbit TrueBlot® Antibody Peroxidase Conjugate was prepared from tissue culture supernatant by Protein G affinity chromatography.
    Sterility
    Sterile filtered
    Components
    Rabbit TrueBlot®: Anti-Rabbit IgG HRP
  • Application Notes
    Western Blot Dilution: 1:1000
    Comment

    Rabbit IgG TrueBlot® is provided as 1000X solution. In order to conserve reagent, we recommend incubating the blots from minigels in sealed bags (removing as much air as possible) with minimal volume (2-3 mL). If used conservatively at 2.5 mL/blot, cat. 18-8816-31 (50µL) will yield enough reagent for 20 blots. Note that there are three key procedural considerations: 1. Protein A or G should not be used for the immunoprecipitation. For immunoprecipitation, anti-mouse IgG beads, anti-rat IgG beads, or anti-rabbit IgG beads should be used for mouse, rat, or rabbit immunoprecipitating antibodies, respectively. 2. Immunoprecipitate should be completely reduced. 3. Milk should be used as the blocking protein for the immunoblot.

    Sample Preparation

    Preparation of Cell Lysate
    1. Harvest approximately 1x10^7 cells by using cell scraper and transfer to conical tube. If working with adherent cells you can skip this step and lyse directly on the plate (see Step 6)
    Note: The total number of cells per mL and the cell equivalent loaded per lane of gel should be optimized specifically for each protein and antibody. Alternatively, protein concentration can be determined using Bradford/Lowry or other protein assay.
    2. Wash cells with 10 mL of cold PBS and centrifuge at 400 xg for 10 minutes at 4 °C.
    3. Discard the supernatant and repeat step 2.
    4. After the second wash, remove the supernatant and resuspend the cell pellet in 1 mL of cold Lysis Buffer containing protease Inhibitors (such as a cocktail- see recipe below). Final concentration of cells should be about 1x10^7 cells/mL.
    Note: If using adherent cells, the cold Lysis Buffer can be added directly to the plate and put on a rocker at 4 °C. Harvest by either scraping or collecting just the supernatant and proceed to Step 8.
    5. Gently vortex/mix and transfer to 1.5 mL tube.
    6. Place on ice for 30 minutes, with occasional mixing.
    7. Centrifuge at 10,000 xg for 15 minutes at 4 °C.
    8. Carefully collect the supernatant, without disturbing the pellet and transfer to a new clean tube and discard pellet.
    9. The protein concentration can be determined by Bradford or other assay. Samples can be diluted to 1 µg/ µL.
    10. The cell lysate can be frozen at this point for long-term storage at -84 °C.

    Cell Lysate Preclearing
    1. Resuspend the immobilized Protein A or Anti-Goat IgG bead slurry by gently vortexing. Remove 50 µL and wash in Lysis buffer or IP buffer, if different. Resupend in 50 µL IP buffer.
    2. Add 500 µL of cell lysate (5x10^6 cells or 500 µg protein) to the pre-equlibrated bead slurry to and incubate on a rocking platform or a rotator for 30-60 minutes at 4 °C.
    3. Centrifuge at 2,500 xg for 2-3 minutes at 4 °C and transfer the supernatant to a new 1.5 mL tube. If any of the bead slurry has been transferred, centrifuge again and carefully transfer the supernatant to another fresh 1.5 mL tube.

    Assay Procedure

    Procedure Step I: Immunoprecipitation
    1. Add 1-10 µg of immunoprecipitation antibody to the tube containing the cold precleared cell lysate.
    Note: This concentration of monoclonal antibody is suggested as a starting point. Each investigator may desire to titrate the concentration of antibody and volume of cell lysate in preliminary experiments to determine the optimal conditions. e.g., 1-10 µg/10^7 cells/1 mL lysate. Typically, 2 µg is a sufficient amount of antibody to maximally immunoprecipitate most antigens in 1 mL of extract from 1x10^7 cells. Using as little IP antibody as possible minimizes potential contamination of SDS reduced sample with nonreduced immunoprecipitating antibody light chain. It is not recommended to use more than
    1. µg (per mL) or a final of 5 µg per lane.
    2. Incubate at 4 °C for 1 hour on a rocking platform or a rotator.
    3. Add at least 50 µL of pre-equilibrated bead slurry to capture the immune complexes.
    4. Incubate for 1 hour or overnight at 4 °C on a rocking platform or a rotator.
    Note: Step 1 and 3 can combined for a single incubation.
    5. Centrifuge the tube at 2,500 xg for
    3. seconds at 4 °C.
    6. Carefully remove supernatant completely and wash the beads 3-5 times with 500 µL of cold Lysis Buffer, centrifuging to pellet beads in between each wash. In order to minimize background, care should be given to remove the supernatant completely after each wash.
    7. After the last wash, carefully aspirate supernatant and add 50 µL of
    1. Laemmli sample buffer (or any equivalent SDS-PAGE sample loading Buffer) to bead pellet.
    Note: Please take into consideration composition of the Loading buffer. Reducing agents can be added.
    8. Vortex and heat to 90-104 °C for
    1. minutes.
    9. Centrifuge at 10,000 xg for 5 minutes, collect supernatant carefully and load onto the gel.
    10. Alternatively, the supernatant samples can be collected, transferred to clean tube and frozen at -84 °C if the gel is to be run later.
    11. Follow manufacturer's instructions for SDS-PAGE.

    Procedure Step II: Immunoblotting (Western Blotting, WB)
    1. Transfer proteins from the gel onto PVDF or nitrocellulose membrane following instructions provided by the transfer system manufacturer for best protein transfer results.
    2. Optional: To determine whether the proteins have been transferred to membrane, stain with a 0.1 % Ponceau S solution. Protein bands can be visualized after staining for 5 minutes. To remove the Ponceau S stain, rinse with distilled water or TBS-T until most of the dye is removed before moving on to blocking step. Residual dye will not affect subsequent steps.
    3. Remove membrane and soak in transfer buffer.
    4. Under chemical hood, place the membrane in TrueBlot® Enhancer Solution and soak for 2 minutes, then wash with TBS-T.
    5. Place the membrane into the 1 % TrueBlot Blocker in TrueBlot® Assay Buffer (enough to cover the membrane) and incubate for 2 hours at room temperature or overnight at 4 °C on a rocking platform. [Preparation of 1 % TrueBlot Blocker in TrueBlot Assay Buffer: Dilute 20X TrueBlot Assay Buffer with dH20 to 1X. Using TrueBlot® Blocker Powder, make a 1 % (w/v) solution.]
    Note: it is recommended to use Milk as the blocking reagent as BSA does not effectively block the reduced Ig chain recognition.
    6. Remove the blocking buffer and rinse blot with TBS-T.
    7. Prepare the primary goat immunoblotting antibody in Blocking Buffer as recommended by the supplier. If the recommended concentration is not known use a standard concentration of 1-2 µg/ml. If using hybrid- oma tissue culture supernatant or serum for immunoblotting, preliminary experiments should be performed to evaluate whether dilution of the supernatant or serum is needed for best results.
    8. Incubate the blot with primary antibody for at least 2 hours at room temperature of overnight at 4 °C on rocking platform.
    Note: Shorter times should be determined empirically for optimal results
    9. After the overnight incubation of the membrane with the primary antibody, wash the blot at least 3-5 times in TBS-T, each wash for a minimum of 5-10 minutes each. Total should be more than 1 hour.
    10. Prepare the secondary antibody Goat IgG TrueBlot® at a 1:1,000 dilution in the Blocking Buffer.
    Note: Please avoid the presence of sodium azide in this step as it is deleterious to the HRP enzyme.
    11. Incubate the blot with the TrueBlot® secondary antibody for one hour at room temperature on a rocking platform.
    12. Wash the blot at least 3-5 times in TBS-T, each wash for at least 5 minutes each. Total should be more than 1 hour.
    13. Prepare Substrate: Mix equal volumes of Substrate A and B
    14. Incubate the blot in chemiluminescent-HRP substrate working solution (combined A and B) for 1. 0.5 minutes.
    15. Expose the blot to X-ray film for an appropriate time period. For best results, expose for ten seconds, one minute, five minutes and 2 minutes.

    Restrictions
    For Research Use only
  • Format
    Liquid
    Buffer
    0.01 M Sodium Phosphate, 0.15 M Sodium Chloride, pH 7.2, 10 mg/mL Bovine Serum Albumin (BSA) - IgG and Protease free, 50 % (v/v) Glycerol
    Handling Advice
    Use of Sodium Azide will inhibit enzyme activity of horseradish peroxidase.
    Storage
    -20 °C
    Storage Comment
    Store at -20 °C. This product is guaranteed for 6 months upon receipt, when handled and stored as instructed.
    Expiry Date
    6 months
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