Flow Cytometry for Pluripotency Markers © Katrin Neumann Flow Cytometry analysis of undifferentiated human iPSCs stained for the transcription factors OCT4 and SOX2 and the surface proteins SSEA4 and TRA-1-60 (Podocalyxin). Analyzed at LSRII (BD) from the Flow Cytometry Facility. Percentage of antibody stained