Peptide Sequences
Peptide Sequences - 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.
05:43
A STAGE Tip Procedure for Desalting and Purification of Peptides
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2026
Source:Tia Rizakos1, Jennifer Geddes-McAlister11Molecular and Cellular Biology Department, University of Guelph.This video demonstrates peptide purification through the STAGE Tip procedure. A miniature column containing resin beads bonded to long hydrocarbon chains facilitates hydrophobic interaction-based purification. Upon loading a pre-digested peptide sample into the column, the peptide fragments bind to the resin beads, allowing impurities to pass through. An elution buffer that disrupts...
08:07
Personalized Peptide Arrays for Detection of HLA Alloantibodies in Organ Transplantation
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Cited by 2 •
2017
Mismatches in human leukocyte antigen (HLA) sequences between organ donor and recipient pairs are the major cause of antibody-mediated rejection in organ transplantation. Here we present the use of custom antigen arrays that are based on individual donors' HLA sequences to probe anti-donor HLA alloantibodies in organ recipients.
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.
08:57
Amplicon Sequencing using the Long-Read Sequencing Technologies
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2025
This protocol was optimized for targeted deep sequencing of 18 drug-resistance regions in Mycobacterium tuberculosis using a long-read sequencing platform, followed by analysis with a tuberculosis-specific bioinformatics pipeline designed for long-read data.
FAQs
Amino acid order determines which chemical properties appear at each position and how those properties are arranged along the chain. That arrangement can influence folding, molecular interactions, stability, and biological activity. Consequently, two peptides containing related amino acids may still behave differently when their order or spacing changes, making sequence organization central to interpreting function.
Spacing determines how chemical features are positioned relative to one another within a peptide. This arrangement can affect folding and the ability of the molecule to participate in specific molecular interactions. Examining spacing therefore helps researchers interpret why sequence variants may differ in stability or biological activity, even when they contain similar types of amino acids.
Functional motifs are recognizable sequence patterns associated with particular activities, whereas protein domains are larger sequence-defined regions that can support structural or functional roles. Researchers inspect peptide sequences for these patterns to connect local sequence features with broader protein organization. This distinction helps separate a short functional signal from evidence of a more extensive domain.
Comparing peptide sequences can reveal similarities that support the investigation of evolutionary relationships. It can also show whether related molecules share sequence features associated with structure or function. In biology, these comparisons help place an individual peptide or protein sequence within a broader set of related molecules and provide context for interpreting conserved or differing regions.
A basic analysis begins by examining the ordered amino acids and their chemical properties, then identifying recognizable functional motifs. Researchers may next use sequence information to predict protein domains and compare related sequences to investigate evolutionary relationships. Interpreting these results alongside observed biological activity helps connect sequence features with molecular function, stability, or cellular relevance.
Sequence information supports synthetic peptide design by linking amino acid order and chemical properties with desired biological activity, stability, or molecular interactions. Researchers can use this relationship to create peptides for experimental investigation or potential biomedical development. The sequence provides a defined molecular framework for testing how changes in composition or arrangement affect performance.
Researchers analyze peptide sequences to characterize signaling or antimicrobial molecules and relate their sequence features to biological activity. This work can clarify how particular molecules participate in cellular processes or interact with biological targets. Sequence-based characterization also supports the development of diagnostic assays and peptide-based therapeutics, connecting molecular analysis with biomedical applications.