Diagnostic Peptides
Diagnostic Peptides - Related Videos
04:00
Immunoaffinity Based Extraction of Ubiquitinylated Peptides: A Technique to Selectively Extract Ubiquitin Tagged Peptides from Purified Peptide Fractions
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2023
This video describes a method to extract and purify ubiquitinylated peptides containing remnant di-glycine peptides from a complex peptide mixture. The presented method may help in identifying original ubiquitination sites in the protein.
10:21
Microfluidic Applications for Disposable Diagnostics
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Cited by 1 •
2008
In this interview, Dr. Klapperich discusses the fabrication of thermoplastic microfluidic devices and their application for development of new diagnostics.
08:57
Peptide and Protein Quantification Using Automated Immuno-MALDI (iMALDI)
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Cited by 13 •
2017
A protocol for the protein quantification in complex biological fluids using automated immuno-MALDI (iMALDI) technology is presented.
21:15
Diagnostic Necropsy and Tissue Harvest
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2016
Source: Kay Stewart, RVT, RLATG, CMAR; Valerie A. Schroeder, RVT, RLATG. University of Notre Dame, IN Many animal experiments rely on final data collection time points that are gathered from the harvesting and testing of organs and tissues. The use of appropriate methods for the collection of organs and tissues can impact the quality of the samples and the analysis of the data that is gleaned for the testing of the tissues. The method of euthanasia of the animal can also impact the quality of...
03:21
Peptide Purification: An RP-HPLC-based Technique to Extract Peptides from Digested Protein Lysates
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2023
In this video, we demonstrate reversed-phase high-performance liquid chromatography to purify peptides from a digested protein lysate mixture. These purified peptides are then lyophilized and stored for downstream applications. Analysis of peptides can help understand the mechanics involved in cellular signaling and cancer.
FAQs
A diagnostic signal arises when a peptide interacts with its intended antibody, receptor, or other biomolecule and that interaction is linked to detection. The peptide may be immobilized on a surface or paired with a detectable label, allowing binding to produce a measurable response. Signal presence or magnitude can then indicate recognition of the selected target.
Sequence determines which molecular features a peptide presents for recognition. Designed or selected sequences can mimic antigenic regions, enabling an assay to examine whether antibodies or other immune components recognize a particular epitope. This focused approach helps researchers characterize responses to selected parts of a pathogen or other biological target rather than treating recognition as a single undifferentiated event.
Because diagnostic peptides have chemically defined sequences, they can be readily modified for assay construction. A modification may support attachment to a surface or connection with a detectable label while preserving the intended recognition function. This flexibility helps adapt the same recognition reagent to different testing formats and contributes to standardized assay designs.
Recognition of selected peptides can provide information about whether antibodies respond to particular antigenic regions. In infection research, this supports identification of pathogen exposure and characterization of the antibody response at the epitope level. The resulting pattern of recognized peptides can therefore distinguish which selected immune targets are detected in a biological test.
A typical workflow begins by selecting or designing a peptide with the desired recognition sequence. The reagent is then attached to a testing surface or paired with a detectable label, followed by exposure to the relevant biological material. Binding is measured through the resulting signal, which is interpreted according to the target and recognition question being investigated.
These reagents are useful when a study needs defined recognition targets for examining pathogen exposure or immune responses. Their chemical definition supports standardized testing, while their compatibility with surface attachment, labels, multiplexed formats, and portable platforms broadens experimental design options. Researchers can use them to compare recognition of selected epitopes across tests or testing configurations.