Oxygen Binding
Oxygen Binding - Related Videos
10:40
Analysis of Cap-binding Proteins in Human Cells Exposed to Physiological Oxygen Conditions
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Cited by 3 •
2016
Here, we present human cell culture protocols to analyze translation initiation factors that bind the 5' cap of mRNA during physiological oxygen conditions. This method utilizes an Agarose-linked m7GTP cap analog and is suitable to investigate cap-binding factors and their interacting partners.
02:18
The Equilibrium Binding Constant and Binding Strength
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2020
The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium: where P and L are the unbound protein and ligand, respectively, and PL is the protein-ligand complex. As the amount of bound ligand is also related to the rate of ligand binding, experiments can also determine Kb by examining the rates of protein-ligand association (kon) and dissociation (koff) using the following ratio: Thus,...
08:58
Cerebral Blood Oxygenation Measurement Based on Oxygen-dependent Quenching of Phosphorescence
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Cited by 28 •
2011
We present an experimental procedure for measuring the partial pressure of oxygen (pO2) in cerebral vasculature based on oxygen-dependent quenching of phosphorescence. Animal preparation and imaging procedures were outlined for both large field of view CCD-based imaging of pO2 in rats and 2-photon excitation based imaging of pO2 in mice.
09:08
Detecting Reactive Oxygen Species
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2023
Reactive oxygen species are chemically active, oxygen-derived molecules capable of oxidizing other molecules. Because of their reactive nature, there are many deleterious effects associated with unchecked ROS production, including structural damage to DNA and other biological molecules. However, ROS can also be mediators of physiological signaling. There is accumulating evidence that ROS play significant roles in everything from activation of transcription factors to the mediation of...
11:46
Synthesis of an Oxygen-Carrying Cobalt(II) Complex
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2023
Source: Deepika Das, Tamara M. Powers, Department of Chemistry, Texas A&M University Bioinorganic chemistry is the field of study that investigates the role that metals play in biology. Approximately half of all proteins contain metals and it is estimated that up to one third of all proteins rely on metal-containing active sites to function. Proteins that feature metals, called metalloproteins, play a vital role in a variety of cell functions that are necessary for life. Metalloproteins...
FAQs
Binding strength reflects how the electronic structure of the oxygen-binding site accommodates O₂. A transition-metal center can coordinate oxygen, while electron transfer can generate superoxide or peroxide species. These alternatives change the chemical character of the association, helping explain why oxygen binding may support transport, storage, or subsequent reactivity.
Coordination attaches O₂ to a transition-metal center through an interaction governed by the site’s electronic structure and geometry. Electron transfer instead changes oxygen into species such as superoxide or peroxide. Distinguishing these pathways matters because they imply different reactivity and help chemists relate an observed oxygen association to oxidation chemistry or biological transport.
The arrangement of atoms around a binding site affects how O₂ can approach and interact with it, while environmental conditions can alter binding strength. Together, these factors influence whether oxygen remains associated, participates in electron transfer, or promotes further reactions. Accounting for both is important when comparing oxygen-binding systems or interpreting their behavior.
Control over oxygen association supports oxygen sensors, separation materials, and catalysts. In each case, the desired outcome differs: a sensor must respond to oxygen, a separation material must interact usefully with it, and a catalyst must use oxygen binding to enable chemical reactivity. These principles connect molecular chemistry with functional material design.
In hemoglobin, oxygen binding provides a chemical framework for understanding how a metalloprotein participates in oxygen transport and storage. The same principles can be considered alongside transition-metal centers, where electronic structure and geometry influence association. This subject-specific context shows how molecular oxygen chemistry connects coordination chemistry with biological function.
Studies of oxygen binding can show how molecular oxygen becomes positioned or chemically altered before participating in a reaction. Coordination to a transition-metal center and formation of superoxide or peroxide species provide distinct routes into oxidation chemistry. Understanding these routes helps explain catalytic behavior and supports the design of systems for energy conversion and related applications.