Barcode Sequencing
Barcode Sequencing - Related Videos
12:59
BEST: Barcode Enabled Sequencing of Tetrads
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Cited by 4 •
2014
Barcode Enabled Sequencing of Tetrads (BEST) replaces the manual processes of isolating, disrupting and spacing tetrads. BEST isolates tetrads by fluorescence-activated cell sorting onto agar plates, separates the spores by agitation with glass beads, and determines which randomly arrayed colonies were derived from the same original tetrad using molecular barcodes.
11:59
Competitive Genomic Screens of Barcoded Yeast Libraries
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Cited by 44 •
2011
We have developed comprehensive, unbiased genome-wide screens to understand gene-drug and gene-environment interactions. Methods for screening these mutant collections are presented.
13:14
Genetic Barcoding with Fluorescent Proteins for Multiplexed Applications
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Cited by 4 •
2015
Since the discovery of the green fluorescent protein gene, fluorescent proteins have impacted molecular cell biology. This protocol describes how expression of distinct fluorescent proteins through genetic engineering is used for barcoding individual cells. The procedure enables tracking distinct populations in a cell mixture, which is ideal for multiplexed applications.
05:42
A Barcoding Assay for Phenotypic and Functional Characterization of Immune Cells
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2025
This video highlights a single-cell proteomic method that employs heavy-metal-conjugated antibodies for distinct cell barcoding. Subsequently, immunostaining and mass cytometry are applied to evaluate immune phenotypic and functional alterations in human whole blood-derived immune cells.
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
The identification step compares the nucleotide pattern obtained from a barcode region with entries in curated reference databases. A close match can link the sequence to a taxonomic identity, while differences in the barcode help distinguish among species. This comparison-based approach is central to building biological inventories and interpreting samples whose organisms are not directly identified by observation.
PCR amplifies the selected barcode region so that it can be sequenced as the resulting product. This creates the sequence information required for comparison with reference records. Because the workflow depends on a defined barcode region, amplification connects the extracted biological material to the taxonomic matching stage used for species identification or sample characterization.
Barcode sequencing can characterize an individual biological sample through a barcode sequence, whereas metabarcoding sequences multiple barcodes from a mixed sample. The mixed-sample approach is useful when many organisms occur together, because sequence information from the collection can support broader characterization. This distinction allows the method to serve both targeted identification and community-level biological surveys.
Reference databases provide the taxonomic records needed to interpret nucleotide patterns. Barcode sequencing therefore depends not only on obtaining a sequence, but also on comparing it with an organized collection of known references. When samples contain organisms that are difficult to observe or culture, this database-based comparison supplies a practical route toward taxonomic characterization.
A typical workflow begins with DNA extraction from the biological material, followed by PCR amplification of a barcode region. Researchers then sequence the resulting product and compare its nucleotide pattern with curated reference databases. Each stage contributes a different type of information: extraction provides the DNA, amplification targets the region, sequencing reveals its pattern, and comparison supports identification.
The method is useful for species identification, biodiversity surveys, food authentication, and conservation monitoring. It also supports analysis of environmental samples, extending biological characterization beyond organisms that researchers can readily observe. These applications use sequence differences as evidence for taxonomic identity, helping researchers survey biological diversity and strengthen inventories across varied sample types.
In ecology, barcode data can make biological surveys more scalable by linking sequence variation with taxonomic identity. Metabarcoding extends this use to mixed samples, while environmental sampling can capture evidence from organisms that are difficult to observe or culture. Together, these capabilities support biodiversity assessment, conservation monitoring, and the development of broader biological inventories.