Fig. 3From: Cooperation of FGF/MEK/ERK and Wnt/β-catenin pathway regulators to promote the proliferation and pluripotency of mouse embryonic stem cells in serum- and feeder-free conditionsCells were cultured with 1 uM PD0325901, 2 uM SU5402 or their combination. a Alkaline phosphatase staining. b DAPI staining for nuclei. c Immunofluorescence staining for OCT4 (c). Scale bar: 100 μmBack to article page