Gaines G, Attardi G
J Mol Biol. 1984 Feb 5;172(4):451-66. doi: 10.1016/s0022-2836(84)80017-0.
Mitochondrial DNA transcription in isolated HeLa cell mitochondria faithfully reproduces the in vivo process. In this system, actinomycin D, proflavine and ethidium bromide preferentially inhibit the formation of ribosomal RNA over that of messenger RNA, strongly supporting independent controls of the two overlapping transcription units involved in their synthesis. The processing step removing the tRNAPhe sequence at the 5' end of the ribosomal RNA precursor is uniquely sensitive to low temperature, proflavine and ethidium bromide.
在分离的HeLa细胞线粒体中,线粒体DNA转录忠实地再现了体内过程。在这个系统中,放线菌素D、原黄素和溴化乙锭优先抑制核糖体RNA的形成,而不是信使RNA的形成,这有力地支持了参与其合成的两个重叠转录单位的独立调控。去除核糖体RNA前体5'端tRNAPhe序列的加工步骤对低温、原黄素和溴化乙锭具有独特的敏感性。