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Tissue-specific usage of alternative splice acceptor sites. The RT-PCR products were amplified from 0.1 μg of total RNA from various human tissues (stomach, HCC +, HCC-, and normal liver) and Hep G2 cultured cells treated with various concentrations of TCDD, and analyzed by electrophoresis on a 2% agarose gel. Human PGK primers are used as an internal standard. The sizes of the PCR products are indicated.
