Precautions for the use of ACES and ADA buffers
Release time:
2023-08-30
In the fields of biochemistry and molecular biology, buffers play a crucial role in maintaining the stability and accuracy of biochemical experiments. N - (2-acetylamino) -2-aminoethanesulfonic acid (ACES) and N - (2-acetylamino) -2-iminodiacetic acid (ADA) are two commonly used buffering agents, but there are differences in their properties and applications. When using these two buffering agents, some precautions need to be taken to ensure the reliability and accuracy of the experiment.
1、 Characteristics and application differences
ACES and ADA are commonly used zwitterionic buffering agents in the fields of biochemistry and molecular biology. ADA can be used as a protein free medium to support chicken embryo fibroblasts, and has also been applied in experiments such as isoelectric focusing. In addition, ADA can interfere with the color reaction in protein quantitative colorimetry, and this factor needs to be considered in experimental design. ACES is a part of the Good's buffer system, with a wide effective pH buffer range (6.1-7.5) and a specific pKa value (6.78, 25 ℃). Attention should also be paid to the ability of ACES to form complexes with certain metal ions in experiments.
2、 Precautions for use
1. Avoiding the influence of competitive inhibitors: ACES has been found to be a competitive inhibitor of GABA receptors. Therefore, when studying the interaction between GABA receptors, buffer containing ACES should be avoided to prevent interference with the results.
2. The concentration should not be too high: ADA can be used as a buffer in cation exchange chromatography, but due to its high ion strength and concentration dependence on pKa, attention should be paid to the concentration not being too high when using it to avoid affecting the experimental results.
3. Stability of metal ion complexes: ACES and ADA are prone to forming complexes with some metal ions. During use, it is necessary to consider the stability of these complexes to avoid affecting the accuracy and reproducibility of the experiment.
4. UV absorption interference: ADA and ACES both have absorption peaks in the UV spectrum, located at 260nm and 230nm, respectively. When conducting UV absorption spectroscopy measurements, it is important to note that interference may occur within the measurement range.
The application of ACES and ADA as biological buffers in experiments should be carefully selected and relevant usage precautions should be followed to ensure the reliability and accuracy of experimental results. Reasonable selection of buffer type, concentration, and conditions during experimental design and operation can help improve the success rate of the experiment. As a production supplier of ACES and ADA buffering agents, Desheng can provide reagent raw materials with a purity of up to 99%, which are suitable for various experiments after preparation. If you have any related needs, please feel free to contact us to purchase!
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