turnover number

(redirected from Turnover frequency)
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turn·o·ver num·ber (kcat),

the number of substrate molecules converted into product in an enzyme-catalyzed reaction under saturating conditions per unit time per unit quantity of enzyme; for example, kcat = Vmax/[Etotal].

turn·o·ver num·ber

(tŭrn'ō-vĕr nŭm'bĕr)
The number of substrate molecules converted into product in an enzyme-catalyzed reaction under saturating conditions per unit time per unit quantity of enzyme; e.g., kcat = Vmax/[Etotal].

turnover

the total of movement of an element or other body constituent in a given time, regardless of the gain or loss of the component.

iron turnover
much of the body's iron store is fixed in intracellular sites and is not available metabolically. The portion of the iron store that is available for mobilization into new sites is called the labile iron pool and may undergo a good deal of metabolic activity.
turnover number
References in periodicals archive ?
Both of these perspectives go beyond a consideration of the replacement costs of separations, which is the primary reason to reduce turnover frequency, and try to assess the costs (or benefits) associated with the performance differences between leavers, stayers, and replacements.
A belief that turnover frequency was inherently bad for an organization fueled research for many years.