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Biodistribution of Cy5-siBcl-2 in organs and tumor tissue after LNPS@Cy5-siBcl-2 or Cy5-siBcl-2 was administered to tumor-bearing mice by tail vein injection (A). Panel B is the statistic result of panel A. Data are expressed as the mean ± SD, n = 5. **P < 0.01, vs free Cy5-siBcl-2 at the same time point.
