Recombinant Anti-LC3B antibody [EPR18709] - Autophagosome Marker (ab192890)

Lane 1: Wild-type HAP1 cell lysate (20 µg)
Lane 2: LC3B knockout HAP1 cell lysate (20 µg)
Lane 3: Human brain tissue lysate (20 µg)
Lane 4: U-87 MG cell lysate (20 µg)
Lanes 1 - 4: Merged signal (red and green).

Green -target observed at 14 and 16 kDa. Red - loading control, ab8245, observed at 37 kDa.

This western blot image is a comparison between ab192890 and a competitor's top cited rabbit polyclonal antibody.

ab192890 staining LC3B in HeLa (Human epithelial cell line from cervix adenocarcinoma) cells +/- Chloroquine (50μM, 24 hours).

The cells were fixed with 100% methanol (5 min), permeabilized with 0.1% Triton X-100 for 5 minutes and then blocked with 1% BSA/10% normal goat serum/0.3M glycine in 0.1% PBS-Tween for 1h. The cells were then incubated overnight at +4°C with ab192890 at 1μg/ml and ab195889, Mouse monoclonal to alpha Tubulin (Alexa Fluor^® 594), at 1/250 dilution (shown in pseudocolor red) followed by a further incubation at room temperature for 1h with a goat secondary antibody to Rabbit IgG (Alexa Fluor^® 488) (ab150081) at 2 μg/ml (shown in green). Nuclear DNA was labeled with DAPI (shown in blue).

Image was taken with a confocal microscope (Leica-Microsystems, TCS SP8).

Alexa Fluor^® 488 (ab225383) and Alexa Fluor^® 647 (ab225382) conjugated versions are available for this clone.

 IHC image of LC3B staining in a section of formalin-fixed paraffin-embedded normal human cerebral cortex* performed on a Leica BOND^TM system using the standard protocol F. The section was pre-treated using heat mediated antigen retrieval with sodium citrate buffer (pH6, epitope retrieval solution 1) for 20mins. The section was then incubated with ab221794, 0.1ug/ml, for 15 mins at room temperature and detected using an HRP conjugated compact polymer system. DAB was used as the chromogen. The section was then counterstained with haematoxylin and mounted with DPX. The inset secondary-only control image is taken from an identical assay without primary antibody.

For other IHC staining systems (automated and non-automated) customers should optimize variable parameters such as antigen retrieval conditions, primary antibody concentration and antibody incubation times.

This data was developed using the same antibody clone in a different buffer formulation containing only PBS (ab221794).

LC3B was immunoprecipitated from 1 mg of HeLa (Human epithelial cell line from cervix adenocarcinoma) whole cell lysate with ab192890 at 1/50 dilution. Western blot was performed from the immunoprecipitate using ab192890 at 1/1000 dilution. VeriBlot for IP Detection Reagent (HRP) (ab131366), was used for detection at 1/10,000 dilution.
Lane 1: HeLa whole cell lysate 10 µg (Input).
Lane 2: ab192890 IP in HeLa whole cell lysate.
Lane 3: Rabbit IgG,monoclonal [EPR25A] Isotype Control (ab172730) instead of ab192890 in HeLa whole cell cell lysate.
Blocking/Dilution buffer: 5% NFDM/TBST.
Exposure time: 30 seconds.

ab192890 staining LC3B in HAP1 cells (wildtype and MAP1LC3B knockout) +/- Chloroquine (50μM, 24 hours).

The cells were fixed with 100% methanol (5 min), permeabilized with 0.1% Triton X-100 for 5 minutes and then blocked with 1% BSA/10% normal goat serum/0.3M glycine in 0.1% PBS-Tween for 1h. The cells were then incubated overnight at +4°C with ab192890 at 1 μg/ml and ab195889, Mouse monoclonal to alpha Tubulin (Alexa Fluor^® 594), at 1/250 dilution (shown in pseudocolor red) followed by a further incubation at room temperature for 1h with a goat secondary antibody to Rabbit IgG (Alexa Fluor^® 488) (ab150081) at 2 μg/ml (shown in green). Nuclear DNA was labeled with DAPI (shown in blue).

Image was taken with a confocal microscope (Leica-Microsystems, TCS SP8).

Lane 1: Wild-type HAP1 cell lysate (20 µg)
Lane 2: LC3B knockout HAP1 cell lysate (20 µg)
Lane 3: Human brain tissue lysate (20 µg)
Lane 4: U-87 MG cell lysate (20 µg)
Lanes 1 - 4: Merged signal (red and green). Green - ab192890 observed at 14 and 16 kDa. Red - loading control, ab8245, observed at 37 kDa.

ab192890 was shown to specifically react with LC3B in wild-type HAP1 cells. No band was observed when LC3B knockout samples were examined. Wild-type and LC3B knockout samples were subjected to SDS-PAGE. ab192890 and ab8245 (loading control to GAPDH) were diluted 1/2000 and 1/10,000 respectively and incubated overnight at 4°C. Blots were developed with Goat anti-Rabbit IgG H&L (IRDye^® 800CW) preadsorbed (ab216773) and Goat anti-Mouse IgG H&L (IRDye^® 680RD) preadsorbed (ab216776) secondary antibodies at 1/10,000 dilution for 1 hour at room temperature before imaging.

Blocking/Dilution buffer: 5% NFDM/TBST.

Exposure times: Lane 1-6: 3 minutes; Lane 7 and 8: 30 seconds.