Streptavidin-hrp Complex
Streptavidin-hrp Complex - 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.
05:13
Isolation of Proteins from Viral DNA-protein Complexes
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2026
Source: Dembowski, J. A., et al. Purification of Viral DNA for the Identification of Associated Viral and Cellular Proteins. J. Vis. Exp. (2017).This video demonstrates the isolation of protein–viral DNA complexes from cell nuclei using click chemistry and magnetic bead purification. The protocol involves labeling viral genomes with alkyne-modified nucleotides, biotinylation via a click reaction, and binding to streptavidin-coated magnetic beads. Following washing and heat elution, the purified...
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.
08:42
Coordination Chemistry Complexes
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2023
Source: Laboratory of Dr. Neal Abrams — SUNY College of Environmental Science and Forestry Transition metals are found everywhere from vitamin supplements to electroplating baths. Transition metals also make up the pigments in many paints and compose all minerals. Typically, transition metals are found in the cationic form since they readily oxidize, or lose electrons, and are surrounded by electron donors called ligands. These ligands do not form ionic or covalent bonds with the metal center,...
02:41
Protein Complex Assembly
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2020
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types. Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes. Many viruses self-assemble into a fully functional unit using the infected host cell to...
FAQs
The biotin label acts as the molecular attachment point for the detection reagent. After a biotinylated antibody, antigen, or nucleic acid probe participates in target recognition, streptavidin binds the attached biotin and brings HRP to the assay location. This arrangement separates target recognition from signal generation, allowing different capture or probe molecules to use the same detection principle.
HRP converts an added substrate into a measurable product, which may produce either visible color or chemiluminescence. The enzyme therefore transforms the molecular binding event into an observable assay signal. Depending on the assay format, that signal can indicate the presence of a target or support measurement of molecular interactions and immune responses.
The system reports where the biotinylated recognition component has associated with its target, while HRP produces a detectable reaction at that site. In formats such as ELISA, the resulting signal supports measurement. In tissue staining, the reaction helps localize targets within the sample. Thus, the same binding and enzyme principles provide either measurement or spatial information.
A typical workflow begins with a biotinylated antibody, antigen, or nucleic acid probe that recognizes the target. The Streptavidin-HRP Complex is then introduced so streptavidin can bind the available biotin. Adding an appropriate substrate allows HRP to generate a colored or chemiluminescent product, producing the readout used to detect or measure the target.
The reagent is used in ELISA, immunoblotting, and tissue staining. Across these formats, biotinylated recognition molecules provide the connection to the target, while HRP supplies the measurable readout. The resulting signal can help researchers detect immune-related molecules, examine molecular interactions, or determine where a target is present in a biological sample.
In immunology and infection studies, the system can detect immune responses, pathogen-associated molecules, and infection biomarkers. A biotinylated antibody, antigen, or nucleic acid probe provides target specificity, while HRP converts binding into a measurable signal. This combination supports both quantitative immunoassays and localization studies, including investigations that use tissue staining to identify targets in biological samples.