ab192056 staining Cytokeratin 14 in A431 cells. The cells were fixed with 100% methanol (5min), permeabilized in 0.1% Triton X-100 for 5 minutes and then blocked in 1% BSA/10% normal goat serum/0.3M glycine in 0.1% PBS-Tween for 1h. The cells were then incubated with ab192056 at a working dilution of 1 in 100 (shown in red) and ab7291 (Mouse monoclonal [DM1A] to alpha Tubulin) at 1µg/ml overnight at +4°C, followed by a further incubation at room temperature for 1h with an Alexa Fluor® 488 Goat anti-Mouse secondary (ab150117) at 2μg/ml (shown in green). Nuclear DNA was labelled in blue with DAPI.This product gave a positive signal in 4% formaldehyde (10min) fixed HeLa cells under the same testing conditions.