PMA rescues MHCII inducibility in low responding LS1034 colon carcinoma cell line. Expression levels of MHCII (mean ± sd) induced by combined treatment with IFNg and PMA are plotted on the left (A) and expression levels of MHCII induced by combined treatment with IFNg, PMA and ethanol are plotted on the right (B). The experiment was repeated 4 times. Different treatments were compared to group 20a or 20b (see Table 1 for details on group codes). Asterisks indicate significant differences on post-hoc tests: *P < 0.05 by Tukey's HSD test; **P < 0.05 by Scheffe's test (see the supplementary file "ANOVA.xls" for original data used to perform this analysis).