All lanes : Anti-PBR antibody [EPR5384] (ab109497) at 1/1000 dilution

Lane 1 : Wild-type HeLa cell lysate
Lane 2 : PBR knockout HeLa cell lysate

Lysates/proteins at 20 µg per lane.

Performed under reducing conditions.

Predicted band size: 19 kDa
Observed band size: 15 kDa why is the actual band size different from the predicted?

Lanes 1- 2: Merged signal (red and green). Green - ab109497 observed at 15 kDa. Red - Anti-GAPDH antibody [6C5] - Loading Control (ab8245) observed at 37 kDa.

 ab109497 was shown to react with PBR in wild-type HeLa cells in western blot. Loss of signal was observed when knockout cell line ab264942 (knockout cell lysate ab257066) was used. Wild-type HeLa and PBR knockout HeLa cell lysates were subjected to SDS-PAGE. Membrane was blocked for 1 hour at room temperature in 0.1% TBST with 3% non-fat dried milk. ab109497 and Anti-GAPDH antibody [6C5] - Loading Control (ab8245) overnight at 4°C at a 1 in 1000 Dilution and a 1 in 20000 dilution respectively. 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 in 20000 dilution for 1 hour at room temperature before imaging.

Allele-1: 5 bp deletion in exon 2.

 

Allele-2: 2 bp deletion in exon 2.

 

Representative images of TSPO knockout HeLa cells, low and high confluency examples (top left and right respectively) and wild-type HeLa cells, low and high confluency (bottom left and right respectively) showing typical adherent, epithelial-like morphology. Images were captured at 10X magnification using a EVOS XL Core microscope.