Embryonic stem (ES) cells are totipotent cells derived from the inner cell mass (ICM) of preimplantation mammalian embryos and are capable of unlimited, undifferentiated proliferation in vitro [1,2,3]. Undifferentiated murine ES cells can be maintained in vitro for extended periods in media containing the cytokine, leukemia-inhibitory factor (LIF) or Millipore's proprietary ES cell culture reagent, ESGRO [4,5]. The undifferentiated state of ES cells can be characterized by high level of expression of Alkaline Phosphatase (AP) [6], the expression of surface markers including SSEA and TRA antigens and the transcription factor Oct-4.
Millipore's Alkaline Phosphatase Detection Kit (Catalog number SCR004) is a specific and sensitive tool for the phenotypic assessment of ES cell differentiation by the determination of AP activity.
Available separately from Millipore are the monoclonal antibodies TRA-2-49 (Catalog Number MAB4349) and TRA-2-54 (Catalog Number MAB4354), which permit the detection of Liver / Bone / Kidney isozyme of AP as expressed by ES cells. When used in flow cytometry, these reagents permit a quantitative assessment of AP expression by ES cells [7].
For Research Use Only; Not for use in diagnostic procedures