Fluorescent TrueBlot^(R): Anti-Ig  

Immunofluorescence microscopy of α-tubulin in U-87 MG cells using FITC-conjugated Fluorescent TrueBlotR anti-mouse IgG (p/n 18-0217-32) for detection. U87-MG cells were fixed with 100% methanol, blocked (5% rat serum/0.3% Triton X-100) for 1hr, then incubated with 15μg/mL of anti-alpha-tubulin primary antibody (p/n 200-301-880) at 4°C overnight. Following 3 washes in 1X PBS for 5min each, 5μg/mL of Fluorescent TrueBlotR anti-mouse IgG Fluorescein was added and allowed to incubate for 1hr at room temperature. 5μg/mL of Fluorescent TrueBlotR anti-mouse IgG FITC was added and allowed to incubate for 1hr at room temperature. Nucleus was counterstained with DAPI present in mounting medium. The predicted main localization is microtubules. Image taken at 63X magnification. (a) Merged α-tubulin (green)/DAPI (blue) image shown (b) secondary only.

Mouse TrueBlotR IP / Western Blot: Caspase 7 was immunoprecipitated from 0.5 ml of 1x10e7 Jurkat cells/ml with 5 ug mouse anti-human Caspase 7. Precipitate from 1x10e6 cells was subjected to electrophoresis, transferred to an PVDF membrane, and Western blotted with anti-Caspase 7 using Mouse TrueBlotR ULTRA: Anti-Mouse Ig HRP (Lane 1) or conventional HRP-conjugated anti-mouse antibody (Lane 2) - note the detection of the heavy and light chains of the immunoprecipitating antibody in Lane 2 but not in Lane 1. When Lane 1 is re-immunoblotted using conventional HRP-conjugated anti-mouse polyclonal antibody (Lane 3), the heavy and light chains are now detected, confirming that although the immunoprecipitating heavy and light chains are present, Mouse TrueBlotR ULTRA: Anti-Mouse Ig HRP detects only native antibody and not denatured heavy and light chains.

Western Blot of Fluorescent TrueBlotR: Anti-Mouse Ig Fluorescein. Lane 1: Mouse IgG, Non-reduced. Lane 2: Mouse IgG, Reduced. Load: 50 ng per lane. Primary antibody: none. Secondary antibody: Fluorescent TrueBlotR: Anti-Mouse Ig Fluorescein at 1:1,000 for 60 min at RT. Block: MB-070 for 30 min at RT. Predicted/Observed size: 160 kDa for Mouse IgG, Non-reduced. Migrates at slightly higher molecular weight. Other band(s): none.