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RT-PCR products for endothelin-1 and endothelin receptor A in rat lung tissue on day 5. The RT-PCR products from the transcripts of ET-1, endotelin receptor A and GAPDH were 156 bp, 118 bp and 89 bp. RT-PCR: reverse transcription-polymerase chain reaction, ET-1: Endothelin-1, GAPDH: glyceraldehyde 3-phosphate dehydrogenase.
