Figure 5.

SSEA-4-positive cells – putative stem cells – isolated by fluorescence-activated cell sorting (FACS) from ovarian (O), testicular (T) and human embryonic stem (E) cell cultures were small, round, yellow-coloured cells with diameters of up to 4 μm. They appeared as single cells or were attached to bigger cells. In one ovarian (O) cell culture and one (T) testicular cell culture these small cells were proliferating (long arrows) or growing into bigger round cells (short arrows) with diameters of up to 10 μm. Scale bars: 10 μm.