to determine if this actin iso-mrna switch during cardiac hypertrophy reflects changes in the transcriptional status of the myocyte nucleus , we quantified the rate of transcription of actin mrnas and total rna , using an in vitro run-on transcription assay with nuclei isolated from the cultured myocytes after stimulation with norepinephrine ( ne ) .
C0035668
rna
C0040649
transcription