To investigate the effect of Sec62 on tumor self-renewal, an in vivo limiting dilution assay was performed. Female BABL/c nude mice (4 to 5 weeks old) were randomly divided into 4 groups (5 mice per group). Sec62-knockdown or control DLD1 cells were injected subcutaneously in the flank with a serial dilution of cells. At the end of 80 days, the tumor incidence of each group was observed and the stem cell frequency was estimated using an online tool at http://bioinf.wehi.edu.au/software/elda.

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