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Application
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Immunoprecipitation (IP)
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Application Notes
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Immunoprecipitation 1) Add primary antibody as suggested in the Applications into 30 µL of 50% protein A agarose beads resuspended in the cold Lysis buffer (50 mM Tris-HCl pH 7.2, 250 mM NaCl, 0.1% NP-40, 2 mM EDTA, 10% glycerol). Mix well and incubate with gentle agitation for 60 minutes at 4 o C. 2) Wash the beads 3-5 times with the cold Lysis buffer (centrifuge the tube at 2,500 x g for 10 seconds). 3) Add 100 µL of the recombinant protein. Mix well and incubate with gentle agitation for 60 minutes at 4 o C. 4) Wash the beads 3-5 times with the cold Lysis buffer (centrifuge the tube at 2,500 x g for 10 seconds). Im m unoprecipita tio n o f K a e d e fro m E.coli w ith norm al m ouse IgG1 (1) or M 106-3 (2). After im m unoprecipitate d w ith th e a n tibody, im m unocom plex w as resolved on SDS-PA GE and im m unoblotted with P M 0 0 2 (A n ti-His-Tag polyclonal a n tibody). IgG Heavy chain Kaede IgG Light Chain 66 45 30 20 12 kD a Im m unoprecipita tio n o f K a e d e fro m E.coli w ith norm al m ouse IgG1 (1) or M 106-3 (2). After im m unoprecipitate d w ith th e a n tibody, im m unocom plex w as resolved on SDS-PA GE and im m unoblotted with P M 0 0 2 (A n ti-His-Tag polyclonal a n tibody). IgG Heavy chain Kaede IgG Light Chain 66 45 30 20 12 kD a IgG Heavy chain IgG Heavy chain Kaede Kaede IgG Light Chain IgG Light Chain 66 45 30 20 12 kD a 66 45 30 20 12 kD a 5) Resuspend the beads in 20 µL of Laemmli’s sample buffer and boil the samples for 2 minutes and centrifuge. Load 10 µL of the sample per lane in a 1 mm thick SDS-polyacrylamide gel for electrophoresis. 6) Blot the protein to a polyvinylidene difluoride (PVDF) membrane at 10V for 45 minutes in a semi-dry transfer system (Transfer Buffer - 25 mM Tris, 190 mM glycine, 20% MeOH). See the manufacture's manual for precise transfer procedure. 7) To reduce nonspecific binding, soak the membrane in 100% Block Ace for 1 hour at room temperature, or overnight at 4 o C. 8) Incubate the membrane with the 1:1,000 anti-His-Tag antibody (MBL, code no.PM002) diluted with 10% Block Ace (in PBS, pH 7.2) for 1 hour at room temperature. 9) Wash the membrane with PBS (5 minutes x 6 times). 10) Incubate the membrane with the 1:10,000 HRP-conjugated anti-rabbit IgG (BioRad, code no. 170-6515) diluted with 1% BSA (in PBS, pH 7.2) for 1 hour at room temperature. 11) Wipe excess buffer from the membrane, then incubate it with appropriate chemiluminescence reagents for 1 minute. Remove extra reagent from the membrane by dabbing with a paper towel, and seal it in plastic wrap. 12) Expose to an X-ray film in a dark room for 2 minutes. Develop the film as usual. The conditions for exposure and development may vary. 050609-1 Western blotting: Not recommended. Immunoprecipitation: 2 µg / 100 µL of the recombinant protein. Immunohistochemistry: Not tested. Immunocytochemistry: Not tested. Flow Cytometry: Not tested.
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Concentration
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1 mg/mL
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Buffer
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100 µg IgG in 100 µL PBS containing 50% glycerol, pH 7.2. Contains no preservatives.
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Restrictions
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For Research Use Only
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