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Dictionary Meaning and Definition on 'Substrates'

Wikipedia Meaning and Definition on 'Substrates'

In biochemistry, a substrate is a molecule upon which an enzyme acts. Enzymes catalyze chemical reactions involving the substrate(s). In the case of a single substrate, the substrate binds with the enzyme active site, and an enzyme-substrate complex is formed. The substrate is transformed into one or more products, which are then released from the active site. The active site is now free to accept another substrate molecule. In in the case of more than one substrate, these may bind in a particular order to the active site, before reacting together to produce products.

For example, curd formation (rennet coagulation) is a reaction that occurs upon adding the enzyme rennin to milk. In this reaction, the substrate is a milk protein (e.g., casein) and the enzyme is rennin. The products are two polypeptides that have been formed by the cleavage of the larger peptide substrate. Another example is the chemical decomposition of hydrogen peroxide carried out by the enzyme catalase. As enzymes are catalysts, they are not changed by the reactions they carry out. The substrate(s), however, is/are converted to product(s). Here, hydrogen peroxide is converted to water and oxygen gas.

[See more about Substrates at Dictionary 3.0 Encyclopedia]

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Substrates Sample Sentences in News

  • IQE receives first one million dollar order for InSb substrates
    Maker of semiconductor wafers IQE has received its first one million dollar purchase order agreement to deliver volume quantities of its InSb substrates to an industry leader and long-term customer. Read more on this news related to 'Substrates'
  • Magnetic Receptive Dry-Erase, Chalkboard, Bamboo Print Media by Visual Magnetics Win ADEX Platinum, Gold Awards
    Three magnetic receptive print substrates from Visual Magnetics' MagnaMedia® product line, VM-DRYerase™, VM-CHALKboard™ and VM-Bamboo™17, have won Awards for Design Excellence . The ADEX awards are the ... Read more on this news related to 'Substrates'
  • Superwetting Surfactants help coat hard-to-wet substrates.
    Designed to have superior balance of properties, including both equilibrium and dynamic wetting, system compatibility, and low foam, Dynol™ 960 and 980 solve the problems associated with coating hard-to-wet substrates. Aiding in film coalescence, siloxane-based superwetters also provide flow and leveling. Products optimize formulation performance, while m Read more on this news related to 'Substrates'

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