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Particle in Biological Definition

ATP synthase

... the membrane. It's easy to visualize the F O F 1 particle as resembling the fruiting body of a common ... of F 1 , and the base and "roots" being the F O particle embedded in the membrane. The F 1 particle was first isolated by Ephraim Racker in 1961. ...

Proteasome

... membrane and consists of a 20S core protease particle and two 19S regulatory particles. The 20S unit ... of a lid and a base with a 19S regulatory particle is attached to each end of the 20S core particle via its base. Some of the subunits in the base ...

Ebola

... in diameter; the length of a filament associated with an individual viral particle is extremely variable, with Ebola particles of up to 14,000 nm in length ... of the virus, which is derived from the host cell membrane. Each viral particle contains one molecule of single-stranded, negative-sense RNA , which ...

Photon

... (QED) which is the oldest part of the Standard Model of particle physics . In layman's terms, photons are the building blocks of ... cannot travel at c , the speed of light in a vacuum. See also particle physics Photonics Optics Spectroscopy Photoelectric effect ...

Virus

... biological viruses has also been prepared. A virus is a small particle that infects cells in biological organisms. Viruses are obligate ... involved in attachment and entry into the host-cell. The complete virus particle is referred to as a virion . A virion is little more than a gene ...

Biological membrane

... whether they succeed to do so. Selective permeability is essential for effective separation of a cell or organelle from its surroundings. If a particle is too large or otherwise unable to cross the membrane by itself, but is still needed by a cell, it could either go through one of the protein ...

Mitochondrion

... Reconstructed by Electron Tomography See also Endosymbiotic theory Chemiosmotic hypothesis Chloroplast Submitochondrial particle Mitochondrial disease Mitochondrial DNA Electrochemical potential Glycolysis Mitochondrial genetics ...

Mitochondrion

... Reconstructed by Electron Tomography See also Endosymbiotic theory Chemiosmotic hypothesis Chloroplast Submitochondrial particle Mitochondrial disease Mitochondrial DNA Electrochemical potential Glycolysis Mitochondrial genetics ...

Nucleosome

... can be seen with an electron microscope as bead-like structures along the DNA. Structure The histones make up the central core particle of the nucleosome. The DNA is wrapped around this protein complex in two turns, with each turn consisting of about 80 base pairs . Together with ...

Prion

... For the bird called a "prion", see Prion (bird) Prions — short for proteinaceous infectious particle — are infectious self-reproducing protein structures. Though their exact mechanisms of action and reproduction are still unknown, it is now ...

Protein

... molecules and ions are able to bind to specific sites on proteins. These sites are called binding sites . They exhibit chemical specificity . The particle that binds is called a ligand . The strength of ligand-protein binding is a property of the binding site known as affinity . Since proteins are ...

Ribosome

... each consisting of a (small) 40S and a bound (large) 60S subunit.[The unit S means Svedberg units, a measure of the rate of sedimentation of a particle in a centrifuge, where the sedimentation rate is associated with the size of the particle. Svedberg units are not additive - two subunits together ...

Vacuole

... Next, the autophagosomes fuse the vacuoles. Finally, the cytoplasms and the organelles are degraded. In a vacuole of budding yeast, a black particle sometimes appears. It is called a dancing body. The dancing body moves actively in the vacuole and appears and disappears within 10 minutes to ...
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