enzyme unit


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enzyme unit

[′en‚zīm ‚yü·nət]
(biochemistry)
The amount of an enzyme that will catalyze the transformation of 10-6 mole of substrate per minute or, when more than one bond of each substrate is attacked, 10-6 of 1 gram equivalent of the group concerned, under specified conditions of temperature, substrate concentration, and pH number.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
We demonstrated that enzyme leakage increased depending on the increasing enzyme unit. This is because of the constant concentrations of the gelatin and glutaraldehyde.
* Parameters Values ** Enzyme unit [product 1.3 x [10.sup.-4] mmol [min.sup.-1] (mmol [min.sup.-1])] Specific enzyme activity 3.3 x [10.sup.-2] mmol [min.sup.-1] [unit/enzyme (mg)] [mg.sup.-1] Catalytic constant 3.9 x [10.sup.3] mol [min.sup.-1] [unit/enzyme (mol ***)] [mol.sup.-1] Turnover (catalytic 3.9 x [10.sup.3] constant/active site) * L-DOPA: 0.6 mM; tyrosinase: 2.0 [micro]g [mL.sup.-1].
One enzyme unit was defined as the amount of enzyme releasing 1 [micro]mol of pnitrophenol per min, and the activity was expressed as U [L.sup.-1].
One enzyme unit was defined as the amount of enzyme which released 1 [micro]M of p-NA per minute at 40[degrees]C.
One enzyme unit was defined as the amount of enzyme required to release 1 [micro]mol of p-nitroaniline per unit time (min).
The packed red cells were washed three times with KCl (0.16 M) and hemolyzed with equal volume of ice-cold water and then centrifuged (4oC 10000xg for 30 min) to remove the ghosts and intact cells.17 Measurement of glutathione reductase (GR) activity: Beutler's method was slightly modified for measurement enzymatic activity at 25oC.1418 One enzyme unit is defined as the oxidation of 1 mol NADPH per min under the assay conditions at 25oC.
One enzyme unit is the amount of enzyme which releases one micromole fatty acid per minute under specified assay conditions and expressed as U/mL/min.
One enzyme unit was defined as the amount of enzyme that produces 1 nmol product/min.
One enzyme unit (IU) was defined as the amount of enzyme that catalyzes the formation of 1 [micro]mol of glucose per minute under the specified conditions [17].
One enzyme unit is defined as the amount of enzyme which is able to decompose 1.725 g of casein
One enzyme unit (U ml-1) is defined as the amount of enzyme which releases 1 [micro]mole glucose.
One enzyme unit was defined as the amount of enzyme that catalyzed the release of 1 [micro]mole of product per minute and was calculated using the appropriate molar extinction coefficient ([member of]) in the assay conditions or a standard curve.
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