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Northern blots of Y. enterocolitica cold shocked to 10°C. The signals were gained by a probe binding to the 5′ untranslated region of cspA1 (YeA1-Dig). Time after cold shock is given in minutes. The upper signal is approximately 900 bp and represents the bicistronic mRNA. The lower signal is approximately 450 bp and represents the monocistronic mRNA. CT, control.
