Amplite® Fluorimetric L-Lactate Dehydrogenase (LDH) Assay Kit
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Telephone | 1-800-990-8053 |
Fax | 1-800-609-2943 |
sales@aatbio.com | |
International | See distributors |
Bulk request | Inquire |
Custom size | Inquire |
Shipping | Standard overnight for United States, inquire for international |
H-phrase | H303, H313, H333 |
Hazard symbol | XN |
Intended use | Research Use Only (RUO) |
R-phrase | R20, R21, R22 |
UNSPSC | 12352200 |
Overview | ![]() ![]() |
Platform
Absorbance microplate reader
Absorbance | 575/605 nm |
Recommended plate | Solid white |
Fluorescence microplate reader
Excitation | 540 nm |
Emission | 590 nm |
Cutoff | 570 nm |
Recommended plate | Solid black |
Components
Example protocol
AT A GLANCE
Protocol summary
- Prepare L-lactate dehydrogenase working solution (50 µL)
- Add L-lactate dehydrogenase standards or test samples (50 µL)
- Incubate at room temperature for 30 minutes - 2 hours
- Monitor fluorescence increase at Ex/Em = 540/590 nm
Important notes
Thaw one of each kit component at room temperature before starting the experiment.
PREPARATION OF STOCK SOLUTION
1. NAD stock solution (100X):
Add 100 µL of H2O into the vial of NAD (Component C) to make 100X NAD stock solution.
2. L-LDH standard solution (100 U/mL):
Add 100 µL of H2O or 1X PBS buffer into the vial of L-LDH standard (Component D) to make 100 U/mL L-LDH standard solution.
PREPARATION OF STANDARD SOLUTION
For convenience, use the Serial Dilution Planner: https://www.aatbio.com/tools/serial-dilution/13812
Add 10 µL of L-LDH standard solution into 990 µL 1X PBS buffer to generate 1000 mU/mL L-LDH standard solution. Take 1000 mU/mL L-LDH standard solution to perform 1:3 serial dilutions to get serial dilutions of L-LDH standard (L-LDH1 - L-LDH7). Note: Diluted L-LDH standard solution is unstable, and should be used within 4 hours.
PREPARATION OF WORKING SOLUTION
1. Add 10 mL of Assay Buffer (Component B) into the bottle of Enzyme Probe (Component A) to have enzyme probe mixture. Note: This enzyme probe mixture is enough for two 96-well plates.
2. Add 50 µL NAD stock solution (100X) into 5 mL of enzyme probe mixture, and mix well. Note: This L-LDH working solution is not stable, and should be used promptly.
SAMPLE EXPERIMENTAL PROTOCOL
Table 1. Layout of L-LDH standards and test samples in a solid black 96-well microplate. L-LDH = L-LDH standard (L-LDH1 - L-LDH7, 0.3 to 300 mU/mL); BL = blank control; TS = test sample.
BL | BL | TS | TS |
L-LDH1 | L-LDH1 | ... | ... |
L-LDH2 | L-LDH2 | ... | ... |
L-LDH3 | L-LDH3 | ||
L-LDH4 | L-LDH4 | ||
L-LDH5 | L-LDH5 | ||
L-LDH6 | L-LDH6 | ||
L-LDH7 | L-LDH7 |
Table 2. Reagent composition for each well.
Well | Volume | Reagent |
L-LDH1 - L-LDH7 | 50 µL | Serial Dilution (0.3 to 300 mU/mL) |
BL | 50 µL | Dilution Buffer |
TS | 50 µL | Test Sample |
- Prepare L-LDH standards (L-LDH), blank controls (BL), and test samples (TS) according to the layout provided in Table 1 and Table 2. For a 384-well plate, use 25 µL of reagent per well instead of 50 µL.
- Add 50 µL of L-LDH working solution to each well of L-LDH standard, blank control, and test samples to make the total assay volume of 100 µL/well. For a 384-well plate, add 25 µL of working solution into each well isntead, for a total volume of 50 µL/well.
- Incubate the reaction at room temperature for 30 minutes to 2 hours, protected from light.
- Monitor the fluorescence increase with a fluorescence plate reader at Excitation = 530 - 570 nm, Emission = 590 - 600 nm (optimal Ex/Em = 540/590 nm, cut off at 570 nm). Note: The contents of the plate can also be transferred to a white/clear bottom plate and read by absorbance microplate reader at the ratio of A575nm/A605nm. However, the absorption detection will have a lower sensitivity compared to that of the fluorescence reading.
Images
Citations
Authors: Brown, Aric
Journal: (2023)
Authors: Xia, Peng and Zhang, Hao and Lu, Haofeng and Xu, Kequan and Jiang, Xiang and Jiang, Yuke and Gongye, Xiangdong and Chen, Zhang and Liu, Jie and Chen, Xi and others,
Journal: Cancer Communications (2023)
Authors: Chen, Liping and Mai, Weiqian and Chen, Minfeng and Hu, Jianyang and Zhuo, Zhenjian and Lei, Xueping and Deng, Lijuan and Liu, Junshan and Yao, Nan and Huang, Maohua and others, undefined
Journal: Pharmacological Research (2017)
Authors: Deng, Li-Juan and Wang, Long-Hai and Peng, Cheng-Kang and Li, Yi-Bin and Huang, Mao-Hua and Chen, Min-Feng and Lei, Xue-Ping and Qi, Ming and Cen, Yun and Ye, Wen-Cai and others, undefined
Journal: Journal of Medicinal Chemistry (2017)
Authors: Zhang, Xiaofang and Wang, Lei and Zhang, Xiaodong and Ren, Lijun and Shi, Wenjing and Tian, Yijun and Zhu, Jiangbo and Zhang, Tianbao
Journal: Food and Chemical Toxicology (2017)
Authors: Sünwoldt, Juliane and Bosche, Bert and Meisel, Andreas and Mergenthaler, Philipp
Journal: Frontiers in Molecular Neuroscience (2017): 305
Authors: Wang, Dong and Wang, Qingjie and Yan, Gaoliang and Qiao, Yong and Sun, Ling and Zhu, Boqian and Tang, Chengchun and Gu, Yuchun
Journal: Biochemical and biophysical research communications (2015): 607--614
Authors: Nomura, Johji and So, Alex and er , undefined and Tamura, Mizuho and Busso, Nathalie
Journal: The Journal of Immunology (2015): 5718--5724
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