Ringformat, supertvinnat duplex-DNA som isolerats från virus, bakterier och mitokondrier. Denna superhelixform av DNA har tillgång till fri energi. Under transkriptionsfasen är omfattningen av RNA-initiering proportionell mot superhelixgraden hos DNA:t.
Circular duplex DNA isolated from viruses, bacteria and mitochondria in supercoiled or supertwisted form. This superhelical DNA is endowed with free energy. During transcription, the magnitude of RNA initiation is proportional to the DNA superhelicity.
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Superhelical DNA — DNA, Supertwisted — Supertwisted DNA — DNA, Supercoiled — Supercoiled DNA