计算溶液所需的质量、体积或浓度。
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Glutamate dehydrogenase is an enzyme in both prokaryotes and eukaryotic mitochondria. Glutamate dehydrogenase can be used for the enzymatic determination of ammonia, alpha-ketoglutaric acid, L-glutamate and urease.
Application
This enzyme can be used for the enzymatic determination of NH₃, α-ketoglutarate, and L-glutamic acid, and also for the activity detection of leucine aminopeptidase and urease; in clinical analysis, by coupling with urease, it can also be used for the enzymatic determination of urea.
Assay procedure
Principle

The disappearance of NADH is measured at 340nm by spectrophotometry.
Unit definition
Reagents
1. Pipette the following reagents into a cuvette (light path:1cm).2.4ml Imidazole-HCl buffer (Reagent B)0.3ml α-Ketoglutarate solution (Reagent C)0.1ml NADH solution (Reagent D)0.1ml Ammonium acetate-EDTA solution (Reagent E)
2. Equilibrate at 25℃ for about 5 min.
3. Add 0.1ml of sample and mix.
4. Record the decrease of absorbance at 340nm in a spectrophotometer thermostated at 25℃,and calculate the ΔA per min using the linear portion of the curve (ΔAₛ).The blank solution is prepared by adding enzyme dilution buffer(Reagent F) instead of sample(ΔA₀).
Calcuation
Activity can be calculated by using the following formula:


| Vt: | Total volume (3.00ml) |
| Vs: | Sample volume (0.1ml) |
| 6.22: | Millimolar extinction coefficient of NADH under the assay condition(cm²/μmol) |
| 1.0: | Light path length(cm) |
| df: | Dilution factor |
| C: | Enzyme concentration in dissolution(c mg/ml) |
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| 批号(Lot Number) | 证书类型 | 货号 |
|---|---|---|
| 分析证书 | R1505822 | |
| 分析证书 | R1505822 | |
| 分析证书 | R1505822 |
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