Selective Reagent Isolation
Selective Reagent Isolation - Related Videos
08:47
Synthesis and Bioconjugation of Thiol-Reactive Reagents for the Creation of Site-Selectively Modified Immunoconjugates
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Cited by 8 •
2019
In this protocol, we will describe the synthesis of PODS, a phenyoxadiazolyl methyl sulfone-based reagent for the site-selective attachment of cargos to the thiols of biomolecules, particularly antibodies. In addition, we will describe the synthesis and characterization of a PODS-bearing bifunctional chelator and its conjugation to a model antibody.
13:49
Semi-automated Biopanning of Bacterial Display Libraries for Peptide Affinity Reagent Discovery and Analysis of Resulting Isolates
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Cited by 6 •
2017
Biopanning bacterial display libraries is a proven technique for discovery of peptide affinity reagents, a robust alternative to antibodies. The semi-automated sorting method herein has streamlined biopanning to decrease the occurrence of false positives. Here we illustrate the thought process and techniques applied in evaluating candidates and minimizing downstream analysis.
04:27
Isolation of Monocytes from Whole Blood by Immunomagnetic Negative Selection
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2025
In this video, we demonstrate the isolation of monocytes from whole human blood by immunomagnetic negative separation. The isolated monocytes can be used for further downstream analysis.
10:17
Preparing Anhydrous Reagents and Equipment
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2023
Source: Laboratory of Dr. Dana Lashley - College of William and Mary Demonstrated by: Timothy Beck and Lucas Arney Many reactions in organic chemistry are moisture-sensitive and must be carried out under careful exclusion of water. In these cases the reagents have a high affinity to react with water from the atmosphere and if left exposed the desired reaction will not take place or give poor yields, because the reactants are chemically altered. In order to prevent undesired reactions with H2O...
02:18
Isolation of Stress-Adapted Bacteria through Single Colony Selection
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2025
Source: Jeong, H., et. al. Procedure for Adaptive Laboratory Evolution of Microorganisms Using a Chemostat. J. Vis. Exp. (2016).This video demonstrates the selective isolation and growth of stress-adapted bacteria from a culture exposed to prolonged stress conditions. The culture is plated on stressor-containing agar, and a single colony is selected to inoculate a liquid medium with the stressor. Absorbance is measured at regular intervals to monitor the growth and confirm the successful...
FAQs
Affinity ligands provide a recognition step by binding the desired reagent more strongly or preferentially than other mixture components. When the mixture contacts the selective capture material, unwanted substances can remain unbound and be removed separately. This difference in binding behavior helps produce a more defined reagent fraction for downstream bioengineering workflows.
Washing removes substances that remain in the mixture without the desired interaction with the capture material. It therefore improves the purity of the retained reagent before recovery. In bioengineering workflows, effective washing helps reduce unwanted components that could otherwise affect assay performance, diagnostic preparation, or the consistency of a biomanufacturing input.
Changing pH, ionic strength, or solvent composition can alter the interaction between the target and the selective capture material. A suitable change weakens that interaction and releases the reagent for collection. These conditions connect the capture and recovery stages, allowing the process to separate retention from elution while supporting a more controlled product fraction.
The capture material must exploit a property that distinguishes the desired reagent from other components in the mixture. In practice, the usefulness of the approach depends on how preferentially the target interacts with the material and how effectively unwanted substances can be removed afterward. These distinctions influence the resulting purity and consistency.
A typical workflow introduces the complex mixture to a selective capture material, permits preferential interaction with the desired reagent, and removes unwanted substances through washing. The retained reagent is then recovered by changing conditions such as pH, ionic strength, or solvent composition. Collectively, these stages produce a prepared reagent fraction for later use.
Bioengineering applications include reagent purification, biomolecule processing, and preparation of defined inputs for assays, diagnostics, and biomanufacturing. The approach is valuable when downstream work requires a more consistent chemical or biological reagent rather than an incompletely separated mixture. Improved purity and process control can support more reliable experiments and preparation workflows.