Catalytic-activity content (cat.cont.)
Synonym |
Catalytic content | ||
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Abbreviation |
Cat.cont. | ||
Definition in words |
Catalytic-activity of component B divided by mass of system 1 Note: Component B is a catalytic component. |
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Definition by equation |
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Systematic terms
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Catalytic-activity content of component B in system 1 | ||
Result type |
Rational scale |
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Numerical values from 0-∞ |
Unit |
nkat/kg, µkat/kg, kat/kg, U/kg, kU/kg etc. Note 1: Katal (abbreviated “kat”), is recommended unit for catalytic-activity kind-of-quantity. (katal=mol/s) Note 2: Enzyme unit (abbreviated “U”) is acceptable for use (e.g. U, kU) but it is recommended to use katal. (Enzyme unit=µmol/min) |
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Special rule(s) in the NPU syntax |
The catalytic component (component B) is termed according to the International Enzyme Nomenclature (see Medical and metrological vocabulary). “Procedure” is stated in the specification to the kind-of-property in the NPU definition. “Procedure” indicates that the measurement procedure must be stated somewhere else than the NPU code and there may be difficulties in comparing values for the same NPU code. |
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Reference |
Ferard G, Dybkaer R, Fuentes-Arderiu X. Compendium of Terminology and Nomenclature of Properties in Clinical Laboratory Sciences : Recommendations 2016. 1 ed: Royal Society of Chemistry; 2016. 182 p. Doi:10.1039/9781782622451. |
Laboratory field |
Examples |
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Clinical Chemistry |
Example 1 | |
Generic abbreviated |
NPU53521 Prot.(Tissue; Intestine)—Lactase; cat.cont.(37 °C; proc.) = ? kU/kg | |
Full result | NPU53521 Protein(Tissue; Intestine)—Lactase; catalytic-activity content(37 °C; procedure) = 75 kiloEnzyme unit per kilogram | |
Abbreviated result | NPU53521 Prot.(Tissue; Intestine)—Lactase; cat.cont.(37 °C; proc.) = 75 kU/kg | |
Written expression | The catalytic-activity content of Lactase divided by mass of protein from Mr. Smith’s inestine tissue is [75] kU/kg. The measurement is performed at 37 °C according to procedure defined by the laboratory. | |
Equation
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Molecular Biology and Genetics |
Example 2 |
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Generic abbreviated |
NPU17370 Lkc prot.—L-Iduronidase; cat.cont.(37 °C; proc.) = ? µkat/kg | |
Full result | NPU17370 Leukocyte protein—L-Iduronidase; catalytic-activity content(37 °C; procedure) = 12 microkatal per kilogram | |
Abbreviated result | NPU17370 Lkc prot.—L-Iduronidase; cat.cont.(37 °C; proc.) = 12 µkat/kg | |
Written expression | The catalytic-activity content of L-Iduronidase of Mr. Smith leukocyte protein is [12] µkat/kg. The measurement is performed at 37 °C according to procedure defined by the laboratory. | |
Equation |
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Reference |
NPU database, https://www.ifcc.org/ifcc-scientific-division/sd-committees/c-npu/npusearch/ and http://www.labterm.dk/default.aspx |
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Kind-of-property
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Nominal kind-of-property
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Kind-of-quantity
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Ordinal kind-of-quantity
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Unitary kind-of-quantity
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Rational unitary kind-of-quantity
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Catalytic-activity content
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Reference |
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Date | Term | Note |
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1996-01-01 | Catalytical-activity content | Term established |
NPU term identifier |
QU50033 |
Date | Notes |
Example |
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2019-06-04 | Catalytic component B is an enzyme, defined by the international enzyme nomenclature (https://www.expasy.org/), and shall be used for catalytic-activity kinds-of-property. Proteins are defined and termed by UNIPROT (https://www.uniprot.org/) and should not be used in relation to catalytic-activity kinds-of-property. Though there are overlaps between these two nomenclatures.. |
The enzyme and protein nomenclatures can have different terms for the same molecule.
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