Table 5.

EC₅₀ values of doxorubicin (72 h), fluorouracil (5-FU) (72 h) and etoposide (48 h).

Sample	Doxorubicin (μM) (72 h)	5-FU (μM) (72 h)	Etoposide (μM) (48 h)
HT29/mock	0.59 ± 0.079 †	0.92 ± 0.15 †	67.85 ± 1.67 †
HT29/ALDH1B1	1.073 ± 0.13 †	1.79 ± 0.056 †	92.47 ± 0.65 †
Statistical significance	**	***	**

^† Results are expressed as mean ± SD of three independent experiments. ** p < 0.01 and *** p < 0.001.