Related Experiment Video
Updated: Jun 11, 2026
07:38
Enabling Real-Time Compensation in Fast Photochemical Oxidations of Proteins for the Determination of Protein Topography Changes
Published on: September 1, 2020
Study on the oxidation form of adenine in phosphate buffer solution
Yuan-Zhi Song1, Jian-Feng Zhou, Feng-Xia Zhu
1Jiangsu Province Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry & Chemical Engineering, Huaiyin Normal University, Huai An 223300, People's Republic of China. songyuanzhi@126.com
Computers in Biology and Medicine
|July 2, 2010
Summary
Adenine oxidation in phosphate buffer was studied using electrochemistry and UV spectroscopy. Results confirm oxidation originates from neutral adenine, linking its electrochemical behavior to molecular structure.
Area of Science:
- Electrochemistry
- Spectroscopy
- Computational Chemistry
Background:
- Adenine is a fundamental component of nucleic acids.
- Understanding adenine's electrochemical behavior is crucial for biochemical studies.
- Previous studies have explored adenine oxidation with varying methodologies.
Purpose of the Study:
- To investigate the electrochemical oxidation of adenine in a phosphate buffer solution.
- To correlate adenine's electrochemical properties with its molecular structure.
- To elucidate the mechanism of adenine oxidation.
Main Methods:
- Square-wave voltammetry was employed to study adenine oxidation.
- In situ UV spectroelectrochemistry provided real-time spectral analysis.
- Density Functional Tight Binding (DFTB3LYP-6-31G (d, p)-PCM) level calculations optimized molecular geometry.
Main Results:
- Experimental and theoretical UV spectra for adenine and its oxidation product were consistent.
- Optimized molecular geometry agreed with existing crystal structure data.
- Electrochemical and spectral data confirmed oxidation originates from neutral adenine.
Conclusions:
- The study successfully linked adenine's electrochemical properties to its molecular structure.
- Neutral adenine is identified as the species undergoing oxidation.
- Combined experimental and theoretical approaches provide a comprehensive understanding of adenine electrochemistry.
Related Concept Videos
02:56Buffers
A solution containing appreciable amounts of a weak conjugate acid-base pair is called a buffer solution, or a buffer. Buffer solutions resist a change in pH when small amounts of a strong acid or a strong base are added. A solution of acetic acid and sodium acetate is an example of a buffer that consists of a weak acid and its salt: CH3COOH (aq) + CH3COONa (aq). An example of a buffer that consists of a weak base and its salt is a solution of ammonia and ammonium chloride: NH3 (aq) + NH4Cl...
01:22Phosphate Buffer
The phosphate buffer system is a critical biological mechanism for maintaining pH stability in the body. This system operates primarily through two components: sodium dihydrogen phosphate (NaH2PO4), which acts as a weak acid, and sodium hydrogen phosphate (Na2HPO4), which serves as a weak base.
Sodium dihydrogen phosphate does not fully dissociate in neutral or acidic solutions. When a strong base, such as sodium hydroxide (NaOH), is introduced into the solution, sodium dihydrogen phosphate...
Sodium dihydrogen phosphate does not fully dissociate in neutral or acidic solutions. When a strong base, such as sodium hydroxide (NaOH), is introduced into the solution, sodium dihydrogen phosphate...
01:08Hydrolysis of ATP
The bonds of adenosine triphosphate (ATP) can be broken through the addition of water, releasing one or two phosphate groups in an exergonic process called hydrolysis. This reaction liberates the energy in the bonds for use in the cell—for instance, to synthesize proteins from amino acids.
If one phosphate group is removed, a molecule of ADP—adenosine diphosphate—remains, along with inorganic phosphate. ADP can be further hydrolyzed to AMP—adenosine monophosphate—by the removal of a second...
If one phosphate group is removed, a molecule of ADP—adenosine diphosphate—remains, along with inorganic phosphate. ADP can be further hydrolyzed to AMP—adenosine monophosphate—by the removal of a second...
01:23ATP and Energy Production
Adenosine triphosphate (ATP) is a critical molecule that functions as the main energy carrier in cells. Structurally, ATP consists of an adenosine molecule—comprising adenine and ribose—bonded to three phosphate groups. The high-energy bonds between these phosphate groups store significant amounts of potential energy. This energy is released during hydrolysis, wherein ATP is converted to adenosine diphosphate (ADP) or adenosine monophosphate (AMP), driving a variety of essential cellular...
01:31ATP Energy Storage and Release
ATP is a highly unstable molecule. Unless quickly used to perform work, ATP spontaneously dissociates into ADP and inorganic phosphate (Pi), and the free energy released during this process is lost as heat. The energy released by ATP hydrolysis is used to perform work inside the cell and depends on a strategy called energy coupling. Cells couple the exergonic reaction of ATP hydrolysis with endergonic reactions, allowing them to proceed.
One example of energy coupling using ATP involves a...
One example of energy coupling using ATP involves a...
01:08Titration of a Weak Acid with a Weak Base
Weak acids and bases do not undergo dissociation completely, and titrations between these two are rarely studied. When such studies are performed, say, for the titration of a weak acid with a weak base, the titration curve plots the change in pH as a function of the volume of base added. Take the titration of acetic acid with ammonia, for instance. During the titration, these two species form ammonium acetate and water, but the pH change is slow and gradual.
As a result, there is no simple...
As a result, there is no simple...