細(xì)胞描述
The cells are very sensitive to post confluence inhibition of cell division, do not produce tumors in syngeneic mice, have no background of spontaneous transformation, nor do they contain overt endogenous transforming murine leukemia or sarcoma viruses.The cells are contact sensitive.There is nodetectable background spontaneous transformation.They are highly susceptible to transformation by chemical agents.Tested and found negative for ectromelia virus(mousepox).Note: the inoculation density, feeding and harvesting schedules must be followed rigidly if the line is to retain its essential characteristics.The batch of serum used for growth and for transformation assays may affect both the morphology of this line and the results obtained.Monolayers established and maintained for the standard transformation assay should be free of all foci after 6 weeks.The depositor recommends that the line be used between the 5th and 15th passages only.