Fig. 4From: Biological impact of xeno-free chemically defined cryopreservation medium on amniotic epithelial cellsStem cell surface marker expression. Representative pseudo-color density plots demonstrate gating strategy in flow cytometric analyses (a). The relative value of tumor rejection antigen (TRA) 1–60 and human embryonic stem cell antigen-1 (HESCA-1)-positive cells to control samples was plotted for the comparison of each xeno-free cryopreservation medium (b). AE amniotic epithelial, SSC side scatter, FSC forward scatterBack to article page