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Representative electrophoresis of RT-PCR products of exons 1 to 4 of CYP2D6 from human liver tissues and HepG2 cells with beta-actin as internal control (464 bp). Lane 1: 100 bp marker, lane 2: A sample having both full length of 700 bp and shorter 300 bp, lane 3: A sample having only shorter ones (300 bp), lane 4: HepG2 cells having no CYP2D6 expressed, Lane 5: A sample having only full length 700 bp of exons 1 to 4 of CYP2D6.
