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Expression of β-adrenergic receptor gene in angiosarcoma tumors. ADRB1 (top panel — 103 base pairs) and ADRB2 (bottom panel — 138 base pairs) RT-PCR products analyzed by 2% agarose gel electrophoresis followed by ethidium bromide staining using 50 bp DNA marker. mRNA was isolated from tumor material obtained from patients #1, #3 and #4. Positive control RNA was extracted from HeLa (ADRB1) and SK-N-SH (ADRB2) cell lines.
