Sucrase Activity Assay Kit
SKU: E-BC-K751-M-96
Sucrase Activity Assay Kit
| SKU # | E-BC-K751-M |
| Detection Instrument | Microplate reader (500-520 nm, optimum wavelength: 505 nm) |
| Detection method | Colorimetric method |
Product Details
Properties
| Sample type | Animal tissue |
| Sensitivity | 20 U/mL |
| Detection range | 20-2000 U/mL |
| Detection method | Colorimetric method |
| Assay type | Enzyme Activity |
| Assay time | 70 min |
| Precision | Average inter-assay CV: 6.500% | Average intra-assay CV: 5.400% |
| Other instruments required | Micropipette, Vortex mixer, Centrifuge |
| Other reagents required | PBS (0.01 M, pH 7.4) |
| Storage | 2-8℃ |
| Valid period | 12 months |
Dilution of Sample
It is recommended to take 2~3 samples with expected large difference to do pre-experiment before formal experiment and dilute the sample according to the result of the pre-experiment and the detection range (20-2000 U/mL).
The recommended dilution factor for different samples is as follows (for reference only):
| Sample type | Dilution factor |
| 20% Rat ileum tissue homogenate | 1 |
| 20% Rat stomach tissue homogenate | 1 |
| 20% Rat liver tissue homogenate | 1 |
Note: The diluent is PBS (0.01 M, pH 7.4).
Detection Principle
Sucrase catalyzes its substrate (sucrose) to produce glucose, which produces hydrogen peroxide under the action of glucose oxidase. Hydrogen peroxide reacts with chromogenic agent to produce red substance, which has a strong absorption peak at 505 nm. In a certain concentration range, It's absorbance is proportional to glucose concentration. Therefore, the activity of sucrase can be calculated by measuring the OD value at 505 nm.
Kit Components & Storage
| Item | Component | Size (96 T) | Storage |
| Reagent 1 | Substrate | Powder × 1 vial | 2-8℃, 12 months |
| Reagent 2 | Buffer Solution | 10 mL × 1 vial | 2-8℃, 12 months |
| Reagent 3 | Phenol Solution | 12 mL × 1 vial | 2-8℃, 12 months, shading light |
| Reagent 4 | Enzyme Solution | 12 mL × 1 vial | 2-8℃, 12 months, shading light |
| Reagent 5 | Stop Solution | Powder × 1 vial | 2-8℃, 12 months |
| Reagent 6 | 50 mmol/L Glucose Standard | 1 mL × 1 vial | 2-8℃, 12 months |
| Microplate | 96 wells | No requirement | |
| Plate Sealer | 2 pieces |
Note: The reagents must be stored strictly according to the preservation conditions in the above table. The reagents in different kits cannot be mixed with each other. For a small volume of reagents, please centrifuge before use, so as not to obtain sufficient amount of reagents.
Technical Data:
Parameter:
Intra-assay Precision
Three rat liver tissue samples were assayed in replicates of 20 to determine precision within an assay (CV = Coefficient of Variation).
| Parameters | Sample 1 | Sample 2 | Sample 3 |
| Mean (U/mL) | 32.50 | 135.00 | 482.00 |
| %CV | 5.7 | 5.3 | 5.2 |
Inter-assay Precision
Three rat liver tissue samples were assayed 20 times in duplicate by three operators to determine precision between assays.
| Parameters | Sample 1 | Sample 2 | Sample 3 |
| Mean (U/mL) | 32.50 | 135.00 | 482.00 |
| %CV | 6.2 | 6.4 | 6.9 |
Recovery
Take three samples of high concentration, middle concentration and low concentration to test the samples of each concentration for 6 times parallelly to get the average recovery rate of 100%.
| Standard 1 | Standard 2 | Standard 3 | |
| Expected Conc. (mmol/L) | 1.5 | 7.8 | 17.5 |
| Observed Conc. (mmol/L) | 1.5 | 8.0 | 16.8 |
| Recovery rate (%) | 101 | 103 | 96 |
Sensitivity
The analytical sensitivity of the assay is 20 U/mL. This was determined by adding two standard deviations to the mean O.D. obtained when the zero standard was assayed 20 times, and calculating the corresponding concentration.
Standard Curve
As the OD value of the standard curve may vary according to the conditions of the actual assay performance (e.g. operator, pipetting technique or temperature effects), so the standard curve and data are provided as below for reference only:
| Concentration (mmol/L) | 0 | 1 | 2 | 5 | 10 | 15 | 20 | 25 |
| Average OD | 0.083 | 0.112 | 0.140 | 0.233 | 0.378 | 0.527 | 0.683 | 0.840 |
| Absoluted OD | 0.000 | 0.030 | 0.058 | 0.150 | 0.295 | 0.444 | 0.600 | 0.757 |