Hemoglobin Purification
Hemoglobin Purification - Related Videos
06:37
Staphylococcus aureus Growth using Human Hemoglobin as an Iron Source
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Cited by 31 •
2013
Here we describe a growth assay for Staphylococcus aureus using hemoglobin as the sole source of available nutrient iron. This assay establishes the role of bacterial factors involved in hemoglobin-derived iron acquisition.
01:24
Hemoglobin
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2024
Hemoglobin is a globular protein made up of four subunits. Two of these subunits are alpha chains, and the other two are beta chains. Each subunit contains a molecule of heme, which has an iron atom and can bind to oxygen. When an oxygen molecule binds to one heme group, it changes the shape of hemoglobin, making it easier for the other heme groups to bind oxygen as well. When all four heme groups are bound to oxygen, the resulting molecule is called oxyhemoglobin. As a result, arterial blood...
04:51
Modeling Neonatal Intraventricular Hemorrhage Through Intraventricular Injection of Hemoglobin
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2025
This video demonstrates a method to generate a rat model of neonatal intraventricular hemorrhage. In this procedure, an anesthetized rat pup is injected with hemoglobin into the lateral ventricle of the brain. The hemoglobin causes oxidative stress and releases heme, simulating intraventricular hemorrhage. The resulting damage to brain tissues, driven by reactive oxygen species and inflammatory cytokines, leads to ventricular enlargement, a common consequence of intraventricular hemorrhage.
05:18
A Rapid and Chemical-free Hemoglobin Assay with Photothermal Angular Light Scattering
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Cited by 1 •
2016
A photo-thermal angular light scattering (PT-AS) sensor enables the rapid and chemical-free hemoglobin assay of nanoliter-scale blood samples. Here, details of the PT-AS setup and a measurement protocol for the hemoglobin concentration in blood are provided. Representative results for anemic blood samples are also presented.
08:16
Plasmid Purification
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2023
Plasmid purification is a technique used to isolate and purify plasmid DNA from genomic DNA, proteins, ribosomes, and the bacterial cell wall. A plasmid is a small, circular, double-stranded DNA that is used as a carrier of specific DNA molecules. When introduced into a host organism via transformation, a plasmid will be replicated, creating numerous copies of the DNA fragment under study. In this video, a step-by-step generalized procedure is described for how to perform plasmid purification.
FAQs
Erythrocyte lysis releases hemoglobin from red blood cells, while centrifugation separates insoluble cellular debris from the liquid fraction containing the target protein. This early clarification step reduces interference from membranes and other cell components before chromatography. Its effectiveness influences the cleanliness of the starting material and therefore the reliability of later biochemical, immunological, or infection-related analyses.
Chromatographic methods can distinguish hemoglobin from remaining contaminants according to molecular size, electrical charge, or binding behavior. Selecting among these separation principles provides different ways to resolve hemoglobin from enzymes and unrelated proteins. The resulting fraction is better defined for experiments in which contaminating proteins could complicate measurements of immune recognition, microbial responses, or hemoglobin-associated biochemical effects.
Maintaining controlled conditions helps retain the structural state of hemoglobin during isolation. Structural changes could alter how the purified material behaves in biochemical assays or how it is interpreted in studies of host-pathogen interactions and immune recognition. Preservation is therefore not only a quality concern; it supports meaningful comparisons between experiments and reduces uncertainty about whether observed effects arise from hemoglobin itself.
Residual membranes, enzymes, or other proteins may contribute biological activities that are incorrectly attributed to hemoglobin. Removing these components makes experimental material more specific for examining heme utilization, oxidative responses, inflammatory signaling, or recognition of blood-derived proteins. Greater purity helps researchers distinguish hemoglobin-related effects from responses caused by unrelated molecules carried through the isolation process.
A typical workflow begins by lysing erythrocytes or processing a hemoglobin-containing biological sample, followed by centrifugation to remove cellular debris. The clarified material then undergoes chromatographic separation selected for size, charge, or binding properties. Controlled handling throughout the workflow supports hemoglobin integrity, while the separated fraction provides defined material for subsequent assays or research experiments.
Purified hemoglobin is useful when experiments require a defined blood-derived component rather than a complex cellular mixture. It can support investigations of host-pathogen interactions, microbial use of heme, oxidative responses, immune recognition, and inflammatory signaling. The material also enables biochemical assays, antibody development, and evaluation of how hemoglobin-related factors influence microbial growth or immune activity.