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This human ES cell line expresses cell surface markers specific to undifferentiated nonhuman primate ES and human EC cells: stage-specific embryonic antigen (SSEA)–3, SSEA-4, TRA-l-60, TRA-1- 81, and alkaline phosphatase. It has a normal 46, XX karyotype. Teratomas are formed upon cell injection into SCID mice. These teratomas include cells from all three germ layers.
This cell line can be cultured using feeder cells or in a feeder-free protocol. When using feeder cells, human ESC culture medium should be compreised of Advanced DMEM/F12 supplemented with knockout serum replacement (20%), non-essential amino acids (1x), L-glutamine (1x), penicillin/streptomycin (1x), β-mercaptoethanol (1x) and FGF-2 (4 ng/ml). Maintain the human ESCs on Matrigel using hESC medium conditioned by mouse embryonic fibroblasts.