Fluorescent TrueBlot(R): Anti-Ig

Immunofluorescence microscopy of a tubulin in A431 cells using DyLightTM 680 conjugated Fluorescent TrueBlotR anti mouse IgG for detection. A431 cells were fixed with 100% methanol, blocked (5% rat serum/0.3% Triton X 100 in 1X PBS) for 1 hr, then incubated with 15 ug/mL of anti a tubulin primary antibody (Cat. No. 200 301 880) at 4C overnight. After 3 washes in 1X PBS for 5 min each, 5 ug/mL of Fluorescent TrueBlotR anti mouse IgG DyLightTM 680 was added and allowed to incubate for 1 hr at room temperature. Nuclei were counterstained with DAPI present in mounting medium. The predicted main localization is microtubules. Image taken at 63X magnification. (a) Merged a tubulin (red)/DAPI (blue) image shown. (b) secondary antibody only.

Immunofluorescence microscopy of α-tubulin in HeLa cells using DyLightTM 680-conjugated Fluorescent TrueBlotR anti-mouse IgG (p/n 18-4417-32) for detection. HeLa cells were fixed with 100% methanol, blocked (5% rat serum/0.3% Triton X-100 in 1X PBS) for 1hr, then incubated with 15ug/mL of anti-alpha-tubulin primary antibody (p/n 200-301-880) at 4C overnight. Following 3 washes in 1X PBS for 5 min each, 5ug/mL of Fluorescent TrueBlotR anti-mouse IgG DyLightTM 680 was added and allowed to incubate for 1hr at room temperature. Nuclei were counterstained with DAPI present in mounting medium. The predicted main localization is microtubules. Image taken at 63X magnification. (a) Merged a-tubulin (red)/DAPI (blue) image shown. (b) secondary antibody 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 DyLight 680 Conjugated. 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 DyLight 680 Conjugated 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.