Confocal microscopy showing the colocalisation of DAPI(a,d), CDH1 (c,d) and GFP (b,d) in iPS cell-derived cells exposed to RA in vitro. CDH1, cadherin-1; DAPI, 4′,6′-diamidino-2-phenylindole; GFP, green fluorescent protein; iPS, induced pluripotent stem; RA, retinoic acid.