The genome is organized into 52 chromosomes (
tightly packed structures of DNA stored in a cell's nucleus), 10 of which determine the animal's sex.
A new digital reconstruction of the chromosomes of the ancestor of all placental mammals reveals that
these tightly packed structures of DNA and proteins have become scrambled over time — a finding that may help pinpoint possible problem sites in our genomes that underlie cancer and other disease.
Several years ago, Wang and his colleagues came up with an approach for using lasers and a rapid cooling process to fuse metal alloy particles together in a dense,
tightly packed structure.
Not exact matches
The human molecules are
tightly packed together, and the more this is the case the more impossible it becomes for them, owing to their nature and
structure, not to merge both physically and in spirit.
Image showing
tightly packed tree crowns in a natural tropical forest, for investigating the forest's
structure.
The results showed that there are different possible configurations: Sometimes the particles are
tightly packed in a simple hexagonal
structure, which is well known from crystals.
To create a new carbon
structure with this ability, an international team tried mimicking opal, which consists of
tightly packed silica spheres.
Making up 70 billion of the nearly 86 billion neurons in the human brain, these relatively simple cells are
tightly packed into the cerebellum, a broccoli - shaped
structure tucked under the back of our brain.
These randomly arranged atoms
pack together more
tightly than a conventional crystalline
structure to give Liquidmetal's alloy its unique properties.
They use experimental approaches to induce the protein to condense into a
tightly packed crystal lattice, then shoot x-rays at the crystal, and finally calculate the protein's
structure from the resulting diffraction patterns.
Instead, human DNA is
tightly wrapped into 23
structures called chromosomes to
pack it more
tightly and fit it inside a cell.]
In a
structure as
tightly packed and interwoven as the brain, robust single - cell labeling is necessary to distinguish individual cells.
This visualization shows
tightly -
packed DNA in a mouse cell's nucleus at different stages of development, seen here in a semi-triangular form as a mature nerve cell; in a roundish shape as a multipotent stem cell; in a more oval form as a neuronal progenitor; and as a more fragmented
structure that shows how removing a specialized binding protein (HP1β knockout) affects the
structure of the DNA -
packing material, called heterochromatin, in a mature neuron.
This computer rendering shows the skeletonized
structure of heterochromatin (red represents a thin region while white represents a thick region), a
tightly packed form of DNA, surrounding another form of DNA - carrying material known as euchromatin (dark blue represents a thin region and yellow represent the thickest) in a mouse's mature nerve cell.
The many vital
structures are very small and
tightly pack into the small critical area.
The mural, which uses imagery from drawings of churches and other buildings in New York City, depicts
tightly packed building - like
structures across the wall as if they had been plucked from a dense urban neighborhood.
Ice bridges are static
structures composed of
tightly packed sea ice that can form during the course of its flow through a narrow strait.