Fig. (5).

Survival of tumor-free mice after challenge with B16.F10 melanoma cells. Survival plots of mice that showed tumor regression and remained tumor free after electrotransfer and were challenged on the opposite flank with B16.F10 melanoma cells. Mice resistant to challenge remained tumor free for the 10 week period post challenge. Mice that developed tumors were termed non-resistant and developed tumors shortly after challenge. Tumor bearing mice either succumbed to disease or were euthanized after weeks 3 and 5 and samples collected for further analysis.