Cover image

Cover Illustration: Phase contrast image of undifferentiated human embryonic stem cell colony (HSF6 line). Cells were cultured on irradiated mouse embryonic fibroblast feeder cells. (Image courtesy of Sohyun L. McElroy and Renee A. Reijo Pera.) For more information on this method, see Culturing Human Embryonic Stem Cells with Mouse Embryonic Fibroblast Feeder Cells (doi:10.1101/pdb.prot5042).