Table 1.

Oligonucleotide primer pairs used for the identification of gene expression in human epithelial cell lines

Gene	Sequence	Predicted size (bp)
ABCB1 (MDR1)
Forward	5′-GTGGGGCAAGTCAGTTCATT-3′	799
Reverse	5′-GCTCCTTGACTCTGCCATTC-3
NR1I2 (PXR)
Forward	5′-TGTATGTGGGGACAAGGC-3′	905
Reverse	5′-TCTGGGGAGAAGAGGGAG-3′
β-Actin
Forward	5′-TCCACGAAACTACCTTCAAC-3′	605
Reverse	5′-TTTAGGATGGCAAGGGAC-3′

Abbreviations: ABCB1, ATP-binding cassette B1; MDR1, multi-drug resistance 1; PXR, pregnane X receptor.