Related Experiment Video
Updated: Jun 19, 2026
03:39
A Precise and Quantifiable Method for Collecting Hemolymph from Small Arthropods
Published on: April 28, 2023
MIXED MOLECULES OF HEMOCYANINS FROM TWO DIFFERENT SPECIES
1Institute of Physical Chemistry, University of Upsala, Upsala, Sweden, and the Laboratories of the International Health Division of The Rockefeller Foundation, New York.
The Journal of Experimental Medicine
|October 30, 2009
Summary
Researchers used an improved electrophoretic technique to study mixed hemocyanins. This method successfully created and analyzed hybrid hemocyanin molecules from two different species by altering pH.
Area of Science:
- Biochemistry
- Protein chemistry
- Molecular biology
Background:
- Hemocyanins are copper-containing proteins responsible for oxygen transport in some invertebrates.
- Hemocyanins can dissociate into subunits and reassociate under specific conditions, such as changes in pH.
Purpose of the Study:
- To investigate the formation and characteristics of mixed hemocyanin association products.
- To evaluate the efficacy of an improved electrophoretic technique for analyzing complex protein mixtures.
Main Methods:
- Utilized an improved electrophoretic technique, specifically the scale method, for high-resolution analysis.
- Manipulated solution pH to induce dissociation and subsequent reassociation of hemocyanins from two different species.
- Employed electrophoretic diagrams to calculate mobility, concentration, and homogeneity of protein components.
Main Results:
- Successfully demonstrated the formation of mixed hemocyanin molecules containing fractions from two distinct species.
- The improved electrophoretic method accurately quantified components that were previously difficult to define.
- pH-induced changes effectively controlled hemocyanin dissociation and reassociation processes.
Conclusions:
- Mixed hemocyanins, composed of subunits from different species, can be successfully synthesized and analyzed.
- The scale method electrophoretic technique offers significant advantages for studying complex protein associations and quantifying individual components.
Related Concept Videos
01:24Hemoglobin
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...
When all four heme groups are bound to oxygen, the resulting molecule is called oxyhemoglobin. As a result, arterial blood...
01:17Colloids and Suspensions
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
02:29Hybrid Zones
Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.Gene flow and natural selection are evolutionary mechanisms that shape the outcome of a hybrid zone. Gene flow...
01:32Aldehydes and Ketones with HCN: Cyanohydrin Formation Overview
Cyanohydrins are compounds that contain –CN and –OH groups on the same carbon atom. They are formed by the nucleophilic addition of the cyanide ions to the carbonyl group. Cyanide ions are highly basic and nucleophilic and can be generated from HCN under aqueous conditions. However, since HCN is a weak acid, the number of cyanide ions generated is very small. Hence, a small amount of base or KCN/NaCN is added to HCN to increase the concentration of the cyanide ions in the reaction mixture.
02:34Structural Isomerism
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
01:17Understanding Species and Reproductive Barriers
A species is a group of organisms that interbreed and produce fertile offspring. Typically, individuals of the same species appear similar and share common characteristics due to their highly similar genomes. However, not all organisms that look alike are members of the same species. Various mechanisms keep most species discrete. While some mechanisms prevent reproductive behavior and fertilization (pre-zygotic isolation), others prevent the production of fertile offspring after mating has...