Fig. 2From: Very small embryonic-like stem cells (VSELs) detected in azoospermic testicular biopsies of adult survivors of childhood cancerImmuno-localization of nuclear OCT-4 and cell surface SSEA-4 with propidium iodide as counterstain. Lower panel shows a single VSEL stained for LINEAGE and CD45 markers (both negative) but is positive for CD133 and DAPIBack to article page