Streptavidin Hrp
Streptavidin Hrp - Related Videos
03:41
Analyzing Influenza Virus Internalization Using a Streptavidin Blocking Assay
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2026
Source: Pohl, M. O. & Stertz, S. Measuring Attachment and Internalization of Influenza A Virus in A549 Cells by Flow Cytometry. J. Vis. Exp. (2015)This video demonstrates the use of a streptavidin blocking assay to distinguish surface-bound from internalized influenza virus in human lung epithelial cells. Comparing fluorescence signals shows that a higher intensity after incubation indicates successful viral internalization.
08:07
Analyzing DNA-Protein Interactions with Streptavidin-Based Biolayer Interferometry
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2025
This article describes a protocol for studying DNA-protein interactions using a streptavidin-based biolayer interferometry (BLI) system. It outlines the essential steps and considerations for utilizing either basic or advanced binding kinetics to determine the equilibrium binding affinity (KD) of the interaction.
04:51
Streptavidin-Affinity Grid Fabrication for Cryo-Electron Microscopy Sample Preparation
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Cited by 15 •
2023
A step-by-step protocol for fabricating streptavidin affinity grids is provided for use in structural studies of challenging macromolecular samples by cryo-electron microscopy.
11:11
Desthiobiotin-Streptavidin-Affinity Mediated Purification of RNA-Interacting Proteins in Mesothelioma Cells
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Cited by 6 •
2018
Desthiobiotin labeling of a synthetic 25-nucleotide RNA oligo, which contains an adenine-rich element (ARE) motif, allows specific binding of cytosolic ARE-binding protein.
03:35
ELISA-Based Reporter Assay to Study the Receptor-Ligand Interaction in BW Cells
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2025
This video demonstrates the reporter assay-based detection of the receptor-ligand interaction. The successful receptor-ligand interaction activates the downstream signaling pathway, causing the generation and release of cytokines as secretory reporter molecules in the solution, which is confirmed using ELISA.
FAQs
The streptavidin component recognizes biotin attached to DNA, RNA, primers, or probes. Because the enzyme-linked reagent binds at the biotinylated target, HRP becomes concentrated where the nucleic-acid recognition event has occurred rather than remaining distributed throughout the assay. This localization connects hybridization or primer-based targeting with a detectable enzymatic readout.
Binding identifies the molecular target but does not create the visible or measurable output. HRP supplies the signal-generating step by catalyzing substrate oxidation in the presence of hydrogen peroxide. Depending on the assay design, the substrate is chromogenic or chemiluminescent, allowing the bound reagent to support visualization or quantification of nucleic-acid detection.
Biotinylation provides the molecular attachment point recognized by streptavidin. DNA, RNA, primers, and probes can each carry biotin, so the same recognition principle can be incorporated into several genetic assay formats. The labeled molecule determines how the target is recognized, while the streptavidin-HRP reagent supplies a common route for enzyme-amplified detection.
The substrate determines how HRP activity is expressed after the reagent has localized to a biotinylated target. A chromogenic substrate produces a signal suitable for visualization, whereas a chemiluminescent substrate produces a light-based signal that can support measurement. Thus, substrate selection changes the readout format without changing the underlying streptavidin-biotin recognition step.
A typical workflow begins with a biotinylated DNA, RNA, primer, or probe participating in the genetic assay. Streptavidin HRP is then allowed to bind the biotin at the target-associated molecule. Adding hydrogen peroxide with a compatible chromogenic or chemiluminescent substrate enables HRP to generate the signal used to visualize or quantify the detected nucleic acid.
Researchers can apply Streptavidin HRP when a genetic assay uses biotinylated nucleic acids and requires enzyme-amplified detection. The reagent is relevant to Southern blotting, hybridization assays, and microarray analysis, where target-associated DNA, RNA, primers, or probes can recruit HRP. Its use links molecular recognition with a measurable signal for analyzing nucleic-acid targets.
The resulting chromogenic or chemiluminescent signal indicates where a biotinylated nucleic-acid target has been detected and can also support quantification. In Southern blotting, hybridization assays, or microarrays, this readout helps translate target recognition into an experimentally observable outcome. Interpretation therefore depends on the target-associated biotin and the HRP-generated signal.