A needle in a haystack: How does a broken DNA molecule get repaired?
How does this work? First, proteins form a filamentous structure on the broken DNA end. Second, this filament examines recently copied DNA or the second DNA chromosome (remember that we have two copies of each chromosome) in search of a DNA sequence that ...
DNA X-Shape Is Not The Actual Structure: What Do Chromosomes Really Look Like?
It may not be as easy as 'X' and 'Y' to determine chromosomes. A recent study shows that DNA shapes are actually much less defined. Scientists have started a new method of visualization for chromosomes, giving a truer display of the shape and revealing ...
How do nucleosomes keep our DNA from reaching the sun?
34 nanometers, or ~0.3 billionths of a meter), so six billion base pairs (all chromosomes laid out head to toe) form a chain that’s two-meters long. If we could hang this DNA ... How does this happen? Biology solves the packing problem with nucleosomes.
In a first, scientists create artificial chromosome
The language of DNA consists of four "letters" — A, T, G and C — which form bonds called base pairs. The synIII chromosome contains 272,871 base ... Boeke's team plans to synthesize larger chromosomes, and do it faster and more cheaply.
Scientists visualize how cancer chromosome abnormalities form in living cells
Chromosomes are thread-like structures inside cells that carry genes and function in heredity. Human chromosomes each contain a single piece of DNA, with the genes ... "Scientists visualize how cancer chromosome abnormalities form in living cells."