Iron Binding Capacity
Iron Binding Capacity - Related Videos
08:45
Quantitating Iron Transport Across the Mouse Placenta In Vivo Using Nonradioactive Iron Isotopes
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Cited by 3 •
2022
This article demonstrates how to prepare and administer transferrin-bound nonradioactive isotopic iron for studies of iron transport in mouse pregnancy. The approach for quantifying isotopic iron in fetoplacental compartments is also described.
01:47
Lung Capacity
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2019
The air in the lungs is measured in volumes and capacities. Lung volume measures reflect the amount of air taken in, released, or left over after a lung function, like a single inhalation. Lung capacity measures are sums of two or more lung volume measures. There are four defined lung volume measures: tidal volume, inspiratory reserve volume, expiratory reserve volume, and residual volume. Tidal volume is the amount of air inhaled and exhaled in a normal breath. Inspiratory...
02:13
Nuclear Binding Energy
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2020
The difference between the calculated and experimentally measured masses is known as the mass defect of the atom. In the case of helium-4, the mass defect indicates a “loss” in mass of 4.0331 amu – 4.0026 amu = 0.0305 amu. The loss in mass accompanying the formation of an atom from protons, neutrons, and electrons is due to the conversion of that mass into energy that is evolved as the atom forms. The nuclear binding energy is the energy produced when the atoms’ nucleons are bound together;...
03:06
Culturing Mycobacterium tuberculosis Under Iron-Limited Conditions
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2025
Source: Gupta, S., et al. Isolation and Characterization of Extracellular Vesicles Produced by Iron-limited Mycobacteria. J. Vis. Exp. (2019)This video demonstrates the procedure for culturing Mycobacterium tuberculosis under iron-limited conditions to induce iron stress and promote the secretion of siderophores that support bacterial survival.
02:42
Determination of the Calcium Retention Capacity of Isolated Mitochondria
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2025
This video demonstrates the procedure to assess mitochondrial calcium retention capacity by monitoring real-time changes in fluorescence as mitochondria uptake calcium. This assay is useful for studying mitochondrial function and calcium-related processes, including apoptosis and neurodegenerative diseases.
FAQs
During the assay, added iron does not represent the patient’s circulating iron alone. It first occupies transferrin sites that were unfilled in the sample. After excess iron is removed, the measured amount corresponds to the additional iron needed to reach saturation, linking the result to the sample’s reserve transport capacity.
Transferrin saturation adds a relational view by comparing circulating iron with the available binding capacity. Total iron-binding capacity describes how much additional iron the transport system can accommodate, whereas saturation indicates how extensively those sites are occupied. Considering both measurements helps characterize iron availability more clearly than either value alone.
These tests describe different aspects of iron metabolism. Iron-binding capacity addresses the carrying capacity associated primarily with transferrin, while serum iron reflects circulating iron and ferritin is included as a related indicator in clinical assessment. Comparing their results helps distinguish patterns associated with iron deficiency, inflammation, or iron overload.
The procedure begins by adding enough iron to occupy unfilled transferrin binding sites in a blood sample. Excess iron that remains unbound is then removed, and the amount required to fill the available sites is measured. The resulting value provides the assay’s estimate of total iron-binding capacity for that sample.
Iron-binding capacity is useful when clinicians are investigating anemia alongside serum iron, ferritin, and related measurements. Its value lies in showing the status of iron transport capacity within a broader biochemical pattern. This combined approach supports evaluation of whether findings are more consistent with iron deficiency, inflammatory conditions, or altered iron storage and handling.
The measurement connects protein-mediated transport with circulating iron availability. Because transferrin binding sites can be assessed before and after experimental iron loading, the assay provides information about how much transport capacity remains unoccupied. In biochemical investigations, that information helps relate blood measurements to broader changes in iron metabolism and homeostatic regulation.