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Polyacrylamide gel electrophoresis of TBA, TBA4, TBA9 and TBA13. L corresponds to 10–100 base-pair ladder. Gels were run at 4, 25, 37 and 70°C. Red arrows point to TBA9 species. Red square at 37°C indicates the absence of one TBA9 species. Red line at 70°C suggests all oligonucleotides are denatured and migrate at a similar rate.
