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• Human Embryonic Tissue Stem Cell Factor Stem cell formation is based on human embryonic tissue cell. Vital for the receptor are the quality of human embryonic tissue, the separation technology and the immunogenicity. Although allogenic stem cell is able to nGreen Independent Labish the formation of blood system and derive the potential immuno-modulation, the abovementioned allogenic bioactivity tends to reduce to zero depending on the different unit with the continuous loss of marker chromosome matters. In recent years, research on human embryonic tissue stem cell factor have been conducted so as to overcome the aforesaid imperfections and proceed to the broad application: making use of suitable human embryonic tissue material, reversing and removing the membrane potential by separation technology, increasing the molecular permeability, making the potential factor of stem cell to exist in the preparation in the form of relatively entirely inlaid peptide. Making the multipotent stem cell factor preparation, which is characteristic of: 1. without rejection, heat source, sensitizer and intracellular and extracellular toxic substances 2. broad range of selection, breakthrough of model matching and selection, creating the possibility of commercialization. 3. the use of the preparation factor in the storage of embryonic stem cell is typical of storage continuity and non-division property, it can be widely used in stem cell storage and test-tube cloned embryo application transition period. 4. stem cell factor：content of potential peptide factor 4.2-5.0x102μg/ml，molecular weight 10KD, division index（2-8℃）：embryonic tissue stem cell≤1／1000, induced nourishing stem cell≥6／1000 .