Navigation Links
Cytosol


The cytosol (as opposed to cytoplasm, which also includes the organelles) is the internal fluid of the cell, and a large part of cell metabolism occurs here. Proteins within the cytosol play an important role in signal transduction pathways, glycolysis, and they act as intracellular receptors and ribosomes. In prokaryotes, all chemical reactions take place in the cytosol. In eukaryotes, the cytosol contains the cell organelles. In plants, the amount of cytosol can be reduced due to the large tonoplast (central vacuole) that takes up most of the cell interior volume.

The cytosol is not a "soup" with free-floating particles, but is highly organized on the molecular level. The cytosol also contains the cytoskeleton. This is made of fibrous proteins (microfilaments, microtubules, and intermediate filaments) and (in many organisms) maintains the shape of the cell, anchors organelles, and controls internal movement of structures, e.g., transport vesicles.

As the concentration of soluble molecules increases within the cytosol, an osmotic gradient builds up toward the outside of the cell. Water flows into the cell, making the cell larger. To prevent the cell from bursting apart, molecular pumps in the plasma membrane, the cytoskeleton, the tonoplast or the cell wall (if present), are used to counteract the osmotic pressure.

Details

The cytosol is 20% to 30% protein.

Normal human cytosolic pH is (roughly) 7.0 (i.e. neutral), whereas the pH of the extracellular fluid is 7.4.


'"/>


(Date:2/26/2017)...  Securus Technologies, a leading provider of civil ... investigation, corrections and monitoring, announces the appointment of ... "Too often, too many offenders return to jail ... trying to tackle this ongoing problem and improve ... members. While significant steps are underway, Securus continues to ...
(Date:2/24/2017)... -- EyeLock LLC, a leader of iris-based identity authentication ... solution on the latest Qualcomm® Snapdragon™ 835 mobile ... Congress 2017 (February 27 – March 2, ... Stand 3E10. The Snapdragon 835 ... combination of hardware, software and biometrics technologies ...
(Date:2/22/2017)... , Feb. 22, 2017 With ... 2021, ABI Research identifies four technologies that innovative ... to secure significant share in the changing competitive ... and passive authentication.   "Companies can ... comes to security," says Dimitrios Pavlakis , ...
Breaking Biology News(10 mins):
Other biology definition