DNA is found in nearly all living cells. However, its exact location within a cell depends on whether that cell possesses a special membrane-bound organelle called a nucleus.

DNA, or deoxyribonucleic acid, is fundamental to your growth, reproduction, and health. Read about its basic function and structures.

4-Strand DNA Structure Found in Cells. A newly discovered unusual nucleic-acid structure might have a role in regulating some genes. By Alison Abbott & Nature magazine.

But a quite different, square-shaped type of DNA structure can easily be created in the laboratory by the folding of synthetic DNA strands rich in guanine, one of the building blocks of DNA.

The discovery builds upon the landmark 1953 breakthrough when Watson and Crick revealed DNA’s double-helix structure. For replication to occur, the helix must first unwind, splitting into two ...

The structure of DNA made visible Date: August 31, 2015 ... -- the very first direct image of a DNA strand with resolution 20 times better than that achieved by Di Fabrizio in 2012.

New Twisted 'Knot' Human DNA Structure Discovered—and It Looks Nothing Like the Double Helix Published Apr 23, 2018 at 12:58 PM EDT Updated Apr 23, 2018 at 1:53 PM EDT By ...

Since 1869, scientists had known about DNA, but its structure remained elusive until 1953. ... they would make a strand 10 feet long, but only one twelve-millionth of an inch thick.

Scientists determine structure of a DNA damage 'first responder' Date: March 21, 2022 Source: Memorial Sloan Kettering Cancer Center Summary: The results of this collaborative project overturn ...

Biology textbooks may be due for a rewrite. For the first time, scientists have detected a DNA structure inside living human cells that looks more like a four-stranded knot than the elegant double ...

Though scientists have learned much about DNA damage and repair over the past 50 years, important outstanding questions remain. One particularly bedeviling puzzle is how a repair protein called the ...