Urea Solubilization
Urea Solubilization - Related Videos
02:23
Visualizing the Effect of pH on Solubilization of the Influenza A Viral Core
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2026
Source: Stauffer, S. et al., In Vitro Disassembly of Influenza A Virus Capsids by Gradient Centrifugation. J. Vis. Exp. (2016)This video demonstrates the effect of pH on the solubilization of influenza A viral cores. Gel electrophoresis and protein staining reveal the progressive disassembly of the core structure under acidic conditions.
08:44
Denaturing Urea Polyacrylamide Gel Electrophoresis (Urea PAGE)
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Cited by 104 •
2009
Denaturing urea polyacrylamide gel electrophoresis is used to separate single-stranded DNA or RNA up to a limit of 500 nucleotides. Urea in combination with heat denatures samples and unstructured single strands migrate within the gel matrix according to their molecular weight.
01:23
Urea Cycle
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2025
The urea cycle describes how liver cells convert ammonia to urea. Ammonia is a toxic waste product of protein catabolism. Land animals must convert ammonia into the less toxic urea which can be safely eliminated by the kidneys through urine. Marine animals excrete ammonia directly, and the surrounding water dilutes the ammonia to safe levels. There are five basic steps in the urea cycle: the conversion of ammonia (NH3) to carbamoyl phosphate the introduction of ornithine in the...
07:52
Removal of Branched and Cyclic Compounds by Urea Adduction for Uk'37 Paleothermometry
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2023
Source: Laboratory of Jeff Salacup - University of Massachusetts Amherst As mentioned in previous videos, the product of an organic solvent extraction, a total lipid extract (TLE), is often a complex mixture of hundreds, if not thousands, of different compounds. The researcher is often only interested in a handful of compounds. In the case of our two organic paleothermometers (Uk'37 and MBT/CBT), the interest is in only 6 compounds (2 alkenones and 4 isoprenoidal glycerol dialkyl glycerol...
10:43
Expression, Detergent Solubilization, and Purification of a Membrane Transporter, the MexB Multidrug Resistance Protein
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Cited by 5 •
2010
In this protocol we demonstrate the expression, solubilization, and purification of a recombinantly expressed membrane protein, MexB, as a soluble protein detergent complex. MexB is a multidrug resistance membrane transporter from the opportunistic bacterial pathogen Pseudomonas aeruginosa.
FAQs
Water promotes contact between urea molecules and the solvent through hydrogen bonding. These interactions compete with the attractions holding urea in its crystal lattice, weakening that organized structure and enabling individual molecules to disperse. This molecular balance explains why aqueous preparation can produce concentrated, uniform reagents when mixing is adequate.
At high concentrations, urea weakens the noncovalent interactions that stabilize proteins. Those interactions help maintain a protein’s organized structure, so reducing them can promote denaturation, or loss of that structure. This effect is especially relevant when biological samples contain poorly soluble or aggregated proteins that must be brought into solution for analysis.
Concentration, temperature, and mixing are the main controllable factors identified for this process. Concentration determines both reagent strength and the extent to which protein-stabilizing interactions may be weakened. Temperature and sufficient mixing support more uniform dissolution, helping prevent variability between preparations and improving the consistency of downstream biological experiments.
Begin by combining urea with the intended aqueous solvent, then mix under controlled conditions until the material is uniformly dispersed. Adjust attention to concentration and temperature throughout preparation, because both affect the final solution and its biological behavior. A visibly uniform preparation is important before using the reagent with samples or analytical procedures.
Urea solutions are useful when researchers need to prepare concentrated reagents or handle proteins that are poorly soluble or aggregated. In biology, the resulting preparations support protein extraction, denaturation, electrophoresis, and biochemical analysis. Their value comes from combining effective sample solubilization with the ability to alter noncovalent protein interactions.
The same chemical property that helps dissolve difficult protein material can also change protein structure by weakening stabilizing noncovalent interactions. Consequently, researchers must consider both improved recovery of soluble material and possible denaturation when interpreting results. Controlling preparation conditions helps distinguish effects of the sample from inconsistencies introduced during reagent preparation.