Catalytic-activity ratio (cat.ratio)
Synonym |
Catalytic ratio | ||
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Abbreviation |
Cat.ratio | ||
Definition in words |
Catalytic-activity of component F divided by catalytic-activity of component G in system 1 Note 1: Component B is the quotient of component F and component G. Note 2: Component F ≠ Component G (≠ = “not equal to”) Note 3: Component F ∉ Component G (∉ = “is not an element of”) |
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Definition by equation |
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Systematic terms
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Catalytic-activity ratio of component B in system 1 | ||
Result type |
Rational scale |
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Numerical values from 0-∞ |
Unit |
10-6, 10-3, 1 (one), 103, 106, etc. | ||
Special rule(s) in the NPU syntax |
The catalytic entities (component F and component G) are 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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Molecular Biology and Genetics |
Example 1 | |
Generic abbreviated |
NPU22149 Muscle prot.—Pyruvatdehydrogenase complex/Citrate (si)-synthase; cat.ratio(25 °C; proc.) = ? | |
Full result | NPU22149 Muscle protein—Pyruvatdehydrogenase complex/Citrate (si)-synthase; catalytic-activity ratio(25 °C; procedure) = 0.75 | |
Abbreviated result | NPU22149 Muscle prot.—Pyruvatdehydrogenase complex/Citrate (si)-synthase; cat.ratio(25 °C; proc.) = 0.75 | |
Written expression | The catalytic-activity ratio of Pyruvatdehydrogenase complex/Citrate (si)-synthase in Mr. Smith’s muscle protein is [0.75]. The measurement is performed at 25 °C according to a procedure defined by the laboratory. | |
Equation
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Example 2 |
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Generic abbreviated form | NPU22153 Muscle prot.—Cytochrome-C oxidase/Citrate (si)-synthase; cat.ratio(25 °C; proc.) = ? | |
Full form with a result | NPU22153 Muscle protein—Cytochrome-C oxidase/Citrate (si)-synthase; catalytic-activity ratio(25 °C; procedure) = 0.18 | |
Abbreviated form with a result | NPU22153 Muscle prot.—Cytochrome-C oxidase/Citrate (si)-synthase; cat.ratio(25 °C; proc.) = 0.18 | |
Written expression | The catalytic-activity content of Cytochrome-C oxidase/Citrate (si)-synthase in Mr. Smith’s muscle protein is [0.18]. The measurement is performed at 25 °C according to procedure defined by the laboratory. | |
Equation |
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Reference |
Kind-of-property
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Nominal kind-of-property
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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 ratio
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Reference |
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Date | Term | Note |
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1996-01-01 | Catalytic-activity ratio | Term established |
NPU term identifier |
QU71772 |
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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