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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

  • AXT, Inc. Announces Second Quarter 2014 Financial Results
    AXT, Inc. , a leading manufacturer of compound semiconductor substrates, today reported financial results for the second quarter ended June 30, 2014. Read more on this news related to 'Substrates'
    SAN FRANCISCO -- (SEMICON West 2014) -- Soitec (Euronext), a world leader in generating and manufacturing revolutionary semiconductor materials for the electronics and energy industries, has reached an ... Read more on this news related to 'Substrates'
  • Compact New Vishay Intertechnology Surface-Mount Precision Thin Film Chip Resistors, Built on Aluminum Nitride ...
    Vishay Intertechnology, Inc. today introduced a new series of high-power, surface-mount precision thin film chip resistors. Built on aluminum nitride substrates, PCAN s Read more on this news related to 'Substrates'

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