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Filtration00:53

Filtration

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Filtration is a physical separation process that involves passing a suspension through a porous medium to separate solids from fluids. During filtration, solids collect on the porous medium while liquids, also collectively known as the filtrate, pass through. The filtration medium is selected based on the filtration purpose, quantity, and nature of the precipitate. The general criteria for a suitable filtering medium are that it is inert, mechanically strong, nonabsorbent toward dissolved...
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Proteins are involved in several cellular processes and biochemical reactions. Analyzing a specific protein of interest requires it to be isolated from the other proteins in the cell. This is achieved by overexpressing the specific gene in a suitable host to produce large quantities of the target protein. A tag or label is recombined with the gene to produce a fusion protein containing the target protein and the tag. The tags on these fusion proteins can then be used for easy detection and...
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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:
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Affinity chromatography is a powerful technique extensively utilized for separating and purifying specific biomolecules from complex mixtures. It capitalizes on the highly selective binding between an analyte and its counterpart, such as antibody-antigen interactions. The counterpart is immobilized on the stationary phase, forming an affinity column. The stationary phase typically consists of solid support, such as agarose or porous glass beads, immobilizing the affinity ligand. The mobile...
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Protein Purification-free Method of Binding Affinity Determination by Microscale Thermophoresis
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Protein Purification-free Method of Binding Affinity Determination by Microscale Thermophoresis

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Protein filter binding.

Sarah Kolitz1, Jon R Lorsch2

  • 1Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.

Methods in Enzymology
|March 29, 2014
PubMed
Summary
This summary is machine-generated.

This study presents a method to measure nucleic acid-protein interactions. It allows for the determination of binding affinity for these crucial molecular interactions.

Keywords:
BindingNucleic acid–protein interactionNytran™ SuPerCharge (SPC) membranesProtein filter bindingWhatman GF/C filters

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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Biophysics

Background:

  • Nucleic acid-protein interactions are fundamental to numerous biological processes, including DNA replication, transcription, and translation.
  • Accurate quantification of these interactions is essential for understanding gene regulation and cellular function.

Purpose of the Study:

  • To describe a novel protocol for monitoring nucleic acid-protein binding.
  • To enable the determination of apparent binding affinity for nucleic acid-protein complexes.

Main Methods:

  • The protocol involves monitoring the binding event between nucleic acids and proteins.
  • This method allows for the quantitative assessment of the interaction's strength.

Main Results:

  • The described method successfully monitors nucleic acid-protein binding.
  • Apparent affinity of the interaction can be reliably determined.

Conclusions:

  • This protocol provides a valuable tool for studying nucleic acid-protein interactions.
  • It facilitates the characterization of binding affinities, aiding in the understanding of molecular mechanisms.