(A) Differentiation protocol used to study endoderm formation and hepatic specification. immunofluorescence analysis of stage specific markers. Scale bars, 100 μm. Positive cell population: flow cytometry analysis, n = 3, mean ± SD. See Figure S1A for histograms.
(B) Transcription factor motif enrichment at differentially accessible chromatin at 48-h intervals. n = sequences analyzed. p values: hypergeometric enrichment test using HOMER default background. See Table S1.
(C) Venn diagram showing the sites co-bound by GATA6, EOMES, SOX17, and FOXA2 in definitive endoderm using previously published ChIP-seq datasets (Tsankov et al., 2015).
(D) ATAC-seq fragment depth during endoderm formation and hepatic specification relative to day 0 values at the identified combinations of transcription factor binding.
Related to Figure S1D and Table S2.