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Diagram of the nucleus showing the ribosome-studded outer nuclear membrane, nuclear pores, DNA (complexed as chromatin), and the nucleolus. The nucleus contains nearly all of the cell's DNA, surrounded by a network of fibrous intermediate filaments called the nuclear matrix, and is enveloped in a double membrane called the nuclear envelope.
A comprehensive diagram of a human cell nucleus. Date: 27 April 2006: Source: I did it myself with adobe ilustrator using the information found here , ,, and : Author: Mariana Ruiz LadyofHats: Permission (Reusing this file)
The following other wikis use this file: Usage on af.wikipedia.org Selkern; Usage on be-tarask.wikipedia.org Ядро вузы; Usage on de.wikipedia.org
Response to technical concerns. Cholesterol can bind to proteins covalently (e.g. hedgehog protein). Each leaflet can have a different glycolipid composition, as well as phospholipid composition (see Flippase). A large fraction of membrane proteins are glycoproteins, globular or no. Agree re the helix looking clunky, but overall it looks ...
This includes the transportation of RNA and ribosomal proteins from the nucleus to the cytoplasm, as well as proteins (such as DNA polymerase and lamins), carbohydrates, signaling molecules, and lipids moving into the nucleus. Notably, the nuclear pore complex (NPC) can actively mediate up to 1000 translocations per complex per second.
The nuclear envelope, also known as the nuclear membrane, [1] [a] is made up of two lipid bilayer membranes that in eukaryotic cells surround the nucleus, which encloses the genetic material. The nuclear envelope consists of two lipid bilayer membranes: an inner nuclear membrane and an outer nuclear membrane. [ 4 ]
A table or chart of nuclides is a two-dimensional graph of isotopes of the elements, in which one axis represents the number of neutrons (symbol N) and the other represents the number of protons (atomic number, symbol Z) in the atomic nucleus. Each point plotted on the graph thus represents a nuclide of a known or hypothetical chemical element.
In order for DNA to pack inside the tiny cell nucleus, each strand is wrapped around histones, forming nucleosome structures. These nucleosome pack together to form chromosomes . Depending on the eukaryote, there are multiple independent chromosomes of varying sizes within each nucleus – for example, humans have 46 while giraffes have 30.