When.com Web Search

Search results

  1. Results From The WOW.Com Content Network
  2. Enzyme unit - Wikipedia

    en.wikipedia.org/wiki/Enzyme_unit

    The enzyme unit, or international unit for enzyme (symbol U, sometimes also IU) is a unit of enzyme's catalytic activity. [1] 1 U (μmol/min) is defined as the amount of the enzyme that catalyzes the conversion of one micro mole of substrate per minute under the specified conditions of the assay method. [2]

  3. Enzyme assay - Wikipedia

    en.wikipedia.org/wiki/Enzyme_assay

    Human enzymes start to denature quickly at temperatures above 40 °C. Enzymes from thermophilic archaea found in the hot springs are stable up to 100 °C. [13] However, the idea of an "optimum" rate of an enzyme reaction is misleading, as the rate observed at any temperature is the product of two rates, the reaction rate and the denaturation rate.

  4. Enzyme - Wikipedia

    en.wikipedia.org/wiki/Enzyme

    IUPAC definition for enzymes. ... which is the substrate concentration required for an enzyme to reach one-half its maximum reaction rate; generally, ...

  5. Turnover number - Wikipedia

    en.wikipedia.org/wiki/Turnover_number

    In enzymology, the turnover number (k cat) is defined as the limiting number of chemical conversions of substrate molecules per second that a single active site will execute for a given enzyme concentration [E T] for enzymes with two or more active sites. [1] For enzymes with a single active site, k cat is referred to as the catalytic constant. [2]

  6. Enzyme kinetics - Wikipedia

    en.wikipedia.org/wiki/Enzyme_kinetics

    For a given enzyme concentration and for relatively low substrate concentrations, the reaction rate increases linearly with substrate concentration; the enzyme molecules are largely free to catalyse the reaction, and increasing substrate concentration means an increasing rate at which the enzyme and substrate molecules encounter one another.

  7. Katal - Wikipedia

    en.wikipedia.org/wiki/Katal

    The katal (symbol: kat) is that catalytic activity that will raise the rate of conversion by one mole per second in a specified assay system. [1] It is a unit of the International System of Units (SI) [1] used for quantifying the catalytic activity of enzymes (that is, measuring the enzymatic activity level in enzyme catalysis) and other catalysts.

  8. Michaelis–Menten kinetics - Wikipedia

    en.wikipedia.org/wiki/Michaelis–Menten_kinetics

    in which e is the concentration of free enzyme (not the total concentration) and x is the concentration of enzyme-substrate complex EA. Conservation of enzyme requires that [28] = where is now the total enzyme concentration. After combining the two expressions some straightforward algebra leads to the following expression for the concentration ...

  9. Control coefficient (biochemistry) - Wikipedia

    en.wikipedia.org/wiki/Control_coefficient...

    In biochemistry, control coefficients [1] are used to describe how much influence a given reaction step has on the flux or concentration of the species at steady state.This can be accomplished experimentally by changing the expression level of a given enzyme and measuring the resulting changes in flux and metabolite levels.