Table 2. Stability of housekeeping genes expression.

Results are shown as GeNorm expression stability values or M, the internal control gene-stability measure, defined as average pairwise variation of a particular gene with all other control genes [26]. Genes with the lowest M values have the most stable expression.

Gene	M (24 h)	M (48 h)
18 S rRNA	0.466	0.402
β2-Microglobulin	0.548	0.503
GAPDH	0.575	0.506
β-Actin	0.682	0.512
RNA polymerase II	0.730	0.532