{"owner": "ArrayExpress Uploader", "pop_total": 0, "species": "human", "factors": [{"GSM1032057": {"DIFFERENTIATION": "Induced by ActivinA", "FACS POPULATION": "not specified", "CELL POPULATION": "Definitive endoderm derived from HSF1", "LENGTH OF DIFFERENTIATION": "5 days"}}, {"GSM1032056": {"DIFFERENTIATION": "None", "FACS POPULATION": "not specified", "CELL POPULATION": "Undifferentiated HSF1", "LENGTH OF DIFFERENTIATION": "0 days"}}, {"GSM1032055": {"DIFFERENTIATION": "Spontaneous", "FACS POPULATION": "PTK7+", "CELL POPULATION": "differentiated XFiPSC2", "LENGTH OF DIFFERENTIATION": "2 days"}}, {"GSM1032054": {"DIFFERENTIATION": "Spontaneous", "FACS POPULATION": "PTK7-", "CELL POPULATION": "differentiated XFiPSC2", "LENGTH OF DIFFERENTIATION": "2 days"}}, {"GSM1032053": {"DIFFERENTIATION": "Spontaneous", "FACS POPULATION": "PTK7+", "CELL POPULATION": "differentiated H9", "LENGTH OF DIFFERENTIATION": "2 days"}}, {"GSM1032052": {"DIFFERENTIATION": "Spontaneous", "FACS POPULATION": "PTK7-", "CELL POPULATION": "differentiated H9", "LENGTH OF DIFFERENTIATION": "2 days"}}], "id": 2694, "ownerprofile_id": "arrayexpress_sid", "platform": 4, "summary_wrapped": "As PSCs differentiate, they display characteristics of EMT as well as PTK7 expression.  We sought to discover novel markers and...", "geo_gse_id": "E-GEOD-42073", "owner_profile": "/profile/8773/arrayexpressuploader", "factor_count": 4, "sample_count": 6, "tags": ["definitive endoderm", "endoderm"], "lastmodified": "Dec.12, 2014", "is_default": false, "geo_id_plat": "E-GEOD-42073_A-AFFY-44", "slug": "expression-data-of-ptk7-and-ptk7-cells-from-differ", "geo_gds_id": "", "name": "Expression data of PTK7+ and PTK7- cells from differentiated pluripotent stem cells (PSC), and expression data from undifferentiated PSC and definitive endoderm", "created": "Jul.12, 2014", "summary": "As PSCs differentiate, they display characteristics of EMT as well as PTK7 expression.  We sought to discover novel markers and regulators of this process by comparing purified PTK7+ and PTK7- populations We used microarrays to detail the global program of gene expression underlying this EMT process and identified distinct classes of up-regulated genes during this process. PTK7+ and PTK7- populations were purified by FACS and subjected to lysis and RNA extraction.  Undifferentiated PSCs and definitive endoderm were washed with PBS, then subjected to lysis and RNA extraction", "source": "http://www.ebi.ac.uk/arrayexpress/experiments/E-GEOD-42073", "sample_source": "http://www.ebi.ac.uk/arrayexpress/experiments/E-GEOD-42073/samples/"}