Circular DNA is DNA that forms a closed loop and has no ends. Examples include:

• Plasmids, mobile genetic elements
• cccDNA, formed by some viruses inside cell nuclei
• Circular bacterial chromosomes
• Mitochondrial DNA (mtDNA)
• Chloroplast DNA (cpDNA), and that of other plastids
• Extrachromosomal circular DNA (eccDNA)

• Inverse polymerase chain reaction (Inverse PCR), technique for finding unknown DNA flanking known DNA
• Effect of circular DNA on gel electrophoresis
• Cyclic nucleotide
• Cyclic adenosine monophosphate (cAMP)
• Cyclic guanosine monophosphate (cGMP)
• Circular RNA
• Cyclic peptide

This disambiguation page lists articles associated with the title Circular DNA.
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