Undifferentiated human embryonic stem cells express VEGFR-2, and VEGFR-2 expression persists on differentiation.

未分化人胚胎干细胞表达VEGFR - 2，并在分化时持续表达。

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CONCLUSION: the relatively pure and undifferentiated limbal stem cells can be obtained by combining non calcium medium and low calcium medium after the basal limbal cell tissues are cultured.

结论：取用角膜缘基底组织进行培养，将无钙培养液与低钙培养基结合，可获得较纯的、未分化的角膜缘干细胞。

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In the detection of IPF1 gene with single cell RT-PCR, 12 single pancreatic stem cells were detected, and another 12 undifferentiated single pancreatic stem cells were taken as controls.

单细胞反转录酶聚合链式反应检测胰岛素促进因子基因实验中，选择12个单个胰腺干细胞进行检测，另取12个单个未分化的干细胞作为对照。

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Embryonic stem cell research involves collecting undifferentiated cells from embryos.

CNN: Dr. Sanjay Gupta: Understanding stem cell research

Embryonic stem cells are "blank" or undifferentiated cells that can develop into any type of cell in the body.

CNN: NIH announces owners of stem cells