Not all DNA looks like the familiar twisted ladder. Sometimes, parts of our genetic code fold into unusual shapes. One such structure, the G-quadruplex (G4), looks like a knot.

Not all DNA looks like the familiar double helix. Sometimes, parts of our genetic code fold into unusual shapes under certain conditions. One such structure known as a G-quadruplex (G4) looks like ...

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Letter Published: 09 November 2000 Cell-cycle-regulated DNA double-strand breaks in somatic hypermutation of immunoglobulin genes F. Nina Papavasiliou & David G. Schatz Nature 408, 216–221 (2000 ...

Unraveling the G4 knot: How cells untie DNA to protect the genome Not all DNA looks like the familiar twisted ladder. Sometimes, parts of our genetic code fold into unusual shapes.