ab190193 staining Cdk2 (phospho Y15) in HeLa cells. The cells were fixed with 100% methanol (5 min), 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 ab190193 at a working dilution of 1 in 100 (shown in green) and ab195889, Mouse monoclonal [DM1A] to alpha Tubulin (Alexa Fluor® 594, shown in red) at a dilution of 1 in 250 overnight at +4°C. Nuclear DNA was labelled in blue with DAPI.Image was taken with a confocal microscope (Leica-Microsystems, TCS SP8).