{"id":7005,"date":"2015-04-03T12:00:15","date_gmt":"2015-04-03T12:00:15","guid":{"rendered":"http:\/\/admin.acceleratingscience.com\/?p=7005"},"modified":"2020-09-26T00:09:14","modified_gmt":"2020-09-26T00:09:14","slug":"sanger-sequencing-using-ce-2-fragment-analysis","status":"publish","type":"post","link":"https:\/\/www.thermofisher.com\/blog\/behindthebench\/sanger-sequencing-using-ce-2-fragment-analysis\/","title":{"rendered":"Sanger Sequencing using CE 2: Fragment Analysis"},"content":{"rendered":"

Introducing Fragment Analysis and how it can be used for a variety of applications formerly requiring manual gels and autoradiography.<\/p>\n

Measuring DNA lengths<\/strong><\/p>\n

\"Fragment<\/p>\n

In Part 1, we took a look at using Sanger dideoxy chemistry to terminate elongating DNA strands, which are then separated via capillary electrophoresis (CE)<\/a> in order to obtain single-base resolution and discrimination between single-base changes in DNA length.<\/p>\n

Here, we will examine another kind of DNA analysis using capillary electrophoresis (CE), to measure DNA fragments of varying size as the final determination, in contrast to using the fragment-size differences to elucidate sequence information.<\/p>\n

In undergraduate biology (and increasingly at the secondary school level), students are taught how manual gel electrophoresis separates DNA molecules on the basis of length, the gel subsequently stained with ethidium bromide dye and then viewed under ultraviolet transillumination and documented by photography. The relative size of the separated molecules are determined by comparison with a known size standard \u2018ladder\u2019. What if this entire process of DNA separation and measurement were completely automated?<\/p>\n

With a capillary electrophoresis instrument, a given DNA assay that has been labeled with the appropriate dye can quickly be sized against a molecular standard for a variety of applications. Any primer-based method that enzymatically incorporates nucleotides (whether with the PCR technique or not) can have a primer labeled with a fluorescent dye, or the nucleotides so labeled, and the resulting products separated and measured in the capillary.<\/p>\n

Many applications<\/strong><\/p>\n

The kinds of applications for this technology are rooted in the legacy applications that once used radioactivity and X-ray film.\u00a0 For example, before microsatellite marker genetics were used for linkage analysis, a method called Restriction Fragment Length Polymorphism (RFLP)<\/a> was first described in 1980. RFLP experiments can now be easily detected using Fragment Analysis.<\/p>\n

Microsatellites are a major application (also called Short Tandem Repeat sequences or STRs), which are repeated units of 2 to 7 nucleotides where each allele may differ by the number of repeats. Microsatellite analysis has been widely used for linkage mapping, parentage analysis, and agricultural breeding, in addition to population genetics.<\/p>\n

Genotyping is another popular application, and our SNaPshot\u2122 Multiplex System uses a dideoxy-nucleotide single-base extension to determine as many as 10 nucleotide variants simultaneously.<\/p>\n

Other applications include Amplification Fragment Length Polymorphisms (AFLP), BAC fingerprinting, Tilling (for agricultural biotechnology), and even Single-Strand Conformational Polymorphism (SSCP). All these applications look at nucleotide variation based upon changes in restriction enzyme recognition sites or variation between the designed primer sites for the PCR, and these methods sample the genetic variation without a priori knowledge of the sequence of the individual sample in question.<\/p>\n

In order to look at deletion mutations such as loss of heterozygosity (LOH), aneuploidy or large chromosomal deletions, Quantitative Fluoresence PCR (QF-PCR) was developed to measure the fluorescent peak height across multiple samples to detect a deletion event. (Due to its haploid nature, a region of LOH will have half the relative fluorescence intensity compared to a normal diploid region.)<\/p>\n

Analyzing DNA fragments on the basis of size means that an application that uses gel-based methods can be adapted for CE by the simple inclusion of a fluorescence-labeled primer or nucleotide. Due to its resolving power, you can multiplex many markers simultaneously with a single dye (and other additional samples with the same assay but with one of the other dyes available).<\/p>\n

Software for fragment analysis<\/strong><\/p>\n

GeneMapper\u2122 Software uses the .fsa files output by the CE instrument Data Collection Software, and performs automated peak detection and extrapolates the size standard information to the detected peaks. (There are four sizing models available to choose from.) Depending on the assay, the software can also call genotypes and assign quality values to the called genotypes, or determine the relative peak heights for quantitative fluorescence determination.<\/p>\n

In addition, there are security and audit features available to assist with meeting 21 CFR Part 11 requirements, as well as customizable report-generation features.<\/p>\n

Resources for more information<\/strong><\/p>\n

Here is more information about microsatellite marker analysis<\/a>, and a PDF is also available <\/a>describing the variety of microsatellite applications.<\/p>\n

Interested in more? Visit the resource pages online:<\/p>\n

RFLP analysis<\/a><\/p>\n

AFLP\u2122 analysis<\/a><\/p>\n

SSCP<\/a><\/p>\n

BAC Fingerprinting<\/a><\/p>\n

QF-PCR<\/a><\/p>\n

GeneMapper\u2122 Software<\/a><\/p>\n

Fragment Analysis Software – Getting Started Guides<\/a><\/p>\n

 <\/p>\n

Check out the whole Series:<\/p>\n

Sanger Sequencing by CE 1: Foundations<\/a><\/p>\n

Sanger Sequencing using CE 2: Fragment Analysis<\/a><\/p>\n

Fragment Analysis using CE 3: Designing a 27-plex PCR<\/a><\/p>\n

Sanger Sequencing by CE 4: Bioinformatics<\/a><\/p>\n

Sanger Sequencing by CE 5: Sanger Sequencing Applications<\/a><\/p>\n

Sanger Sequencing by CE 6: Resources<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Introducing Fragment Analysis and how it can be used for a variety of applications formerly requiring manual gels and autoradiography. Measuring DNA lengths In Part 1, we took a look at using Sanger dideoxy chemistry to terminate elongating DNA strands, which are then separated via capillary electrophoresis (CE) in order to obtain single-base resolution and<\/p>\n","protected":false},"author":120,"featured_media":7009,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_monsterinsights_skip_tracking":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[184,108],"tags":[17,189,36,99,153,25,74],"division":[],"class_list":{"0":"post-7005","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-bioinformatics","8":"category-lab-tips-and-tricks","9":"tag-applied-biosystems","10":"tag-bioinformatics-software","11":"tag-capillary-electrophoresis","12":"tag-fragment-analysis","13":"tag-genomic-variants","14":"tag-sanger-sequencing","15":"tag-sequencing","16":"entry"},"_selected_authors":"","_selected_reviewers":"","acf":[],"yoast_head":"\nSanger Sequencing using CE 2: Fragment Analysis - Behind the Bench<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.thermofisher.com\/blog\/behindthebench\/sanger-sequencing-using-ce-2-fragment-analysis\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sanger Sequencing using CE 2: Fragment Analysis\" \/>\n<meta property=\"og:description\" content=\"Introducing Fragment Analysis and how it can be used for a variety of applications formerly requiring manual gels and autoradiography. 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Yet as research evolves, so do the demands placed on sequencing workflows. Today\u2019s labs are not only looking for accuracy\u2014they need speed, flexibility, and reliable\u2026","rel":"","context":"In "General"","block_context":{"text":"General","link":"https:\/\/admin.acceleratingscience.com\/behindthebench\/general\/"},"img":{"alt_text":"DNA sequencing sample tube with DNA helix and sequencing chromatogram representing Sanger sequencing workflow.","src":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/08\/ChatGPT-Image-Aug-5-2026-09_44_12-AM.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/08\/ChatGPT-Image-Aug-5-2026-09_44_12-AM.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/08\/ChatGPT-Image-Aug-5-2026-09_44_12-AM.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/08\/ChatGPT-Image-Aug-5-2026-09_44_12-AM.png?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/08\/ChatGPT-Image-Aug-5-2026-09_44_12-AM.png?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/08\/ChatGPT-Image-Aug-5-2026-09_44_12-AM.png?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":19509,"url":"https:\/\/www.thermofisher.com\/blog\/behindthebench\/cfdna-fragmentomics-analysis-qpcr-cancer-monitoring\/","url_meta":{"origin":7005,"position":1},"title":"qPCR-based fragmentomics for monitoring cancer disease progression","author":"Behind The Bench Staff","date":"March 5, 2026","format":false,"excerpt":"As fragmentomics gains momentum in cancer liquid biopsy research, attention is increasingly turning to how these structural cfDNA signals can be measured in a way that is both sensitive and practical. Established qPCR platforms offer an alternative to sequencing-based approaches for capturing fragment size information with high precision. Using a\u2026","rel":"","context":"In "Bioinformatics"","block_context":{"text":"Bioinformatics","link":"https:\/\/admin.acceleratingscience.com\/behindthebench\/bioinformatics\/"},"img":{"alt_text":"Scientist pipetting into a 96 well plate during qPCR workflow for cell free DNA fragmentomics analysis","src":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/03\/Picture1.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/03\/Picture1.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/03\/Picture1.png?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":19168,"url":"https:\/\/www.thermofisher.com\/blog\/behindthebench\/understanding-dna-melting-analysis-using-uv-visible-spectroscopy\/","url_meta":{"origin":7005,"position":2},"title":"Understanding DNA Melting Analysis Using UV-Visible Spectroscopy","author":"Marlene Gasdia-Cochrane","date":"October 14, 2025","format":false,"excerpt":"DNA melting analysis is a vital molecular biology technique used to study the stability and properties of DNA by monitoring its transition from double-stranded to single-stranded form with increasing temperature. UV-visible spectroscopy measures changes in DNA absorbance during this process, providing insights into DNA stability, sequence composition, and molecular interactions.\u2026","rel":"","context":"In "Pharma & Biotech Manufacturing"","block_context":{"text":"Pharma & Biotech Manufacturing","link":"https:\/\/admin.acceleratingscience.com\/behindthebench\/pharmamfg\/"},"img":{"alt_text":"Close-up Of Dna Molecule On Blue Background","src":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2025\/10\/iStock-2200215349.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2025\/10\/iStock-2200215349.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2025\/10\/iStock-2200215349.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2025\/10\/iStock-2200215349.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2025\/10\/iStock-2200215349.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2025\/10\/iStock-2200215349.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":19943,"url":"https:\/\/www.thermofisher.com\/blog\/behindthebench\/dna-and-rna-purity-ratios-a260-a280-and-a260-a230-explained\/","url_meta":{"origin":7005,"position":3},"title":"DNA and RNA Purity Ratios: A260\/A280 and A260\/A230 Explained","author":"Marlene Gasdia-Cochrane","date":"September 1, 2026","format":false,"excerpt":"Overview DNA and RNA purity ratios help researchers assess nucleic acid sample quality before downstream analysis. The A260\/A280 ratio can indicate potential protein contamination, while the A260\/A230 ratio can reveal residual salts, phenol, guanidine compounds, and other extraction-related contaminants. For a more complete assessment, purity ratios should be evaluated alongside\u2026","rel":"","context":"In "General"","block_context":{"text":"General","link":"https:\/\/admin.acceleratingscience.com\/behindthebench\/general\/"},"img":{"alt_text":"mRNA Technology - Messenger RNA - Two Strands of mRNA on Abstract Technology Background - Development of New Therapies and Vaccines Based on mRNA Technology - Conceptual Illustration","src":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/08\/iStock-1366552805_mrna.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/08\/iStock-1366552805_mrna.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/08\/iStock-1366552805_mrna.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/08\/iStock-1366552805_mrna.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/08\/iStock-1366552805_mrna.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/08\/iStock-1366552805_mrna.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":19640,"url":"https:\/\/www.thermofisher.com\/blog\/behindthebench\/direct-from-lysate-snp-genotyping-in-research-applications\/","url_meta":{"origin":7005,"position":4},"title":"Direct-from-Lysate SNP Genotyping in Research Applications","author":"Ashleigh Barlow","date":"April 6, 2026","format":false,"excerpt":"Direct-from-lysate workflow enabled by DNA Extract All Reagents compared to traditional DNA purification for SNP genotyping applications. Can You Perform SNP Genotyping Without DNA Purification? The short answer: In many research workflows, direct-from-lysate SNP genotyping can be performed without traditional DNA purification\u2014when appropriate chemistries and verification procedures are used. Direct-from-lysate\u2026","rel":"","context":"In "General"","block_context":{"text":"General","link":"https:\/\/admin.acceleratingscience.com\/behindthebench\/general\/"},"img":{"alt_text":"Comparison of traditional DNA purification workflow and direct-from-lysate workflow using DNA Extract All Reagents for SNP genotyping prior to qPCR.","src":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/04\/blog-image-1.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/04\/blog-image-1.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/04\/blog-image-1.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/04\/blog-image-1.png?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/04\/blog-image-1.png?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/04\/blog-image-1.png?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":19883,"url":"https:\/\/www.thermofisher.com\/blog\/behindthebench\/building-a-better-sample-qc-workflow-from-extraction-to-sequencing\/","url_meta":{"origin":7005,"position":5},"title":"Building a Better Sample QC Workflow: From Extraction to Sequencing","author":"Marlene Gasdia-Cochrane","date":"August 25, 2026","format":false,"excerpt":"Article Summary Successful genomics experiments don't begin with sequencing\u2014they begin with sample quality. Every downstream application, from PCR to next-generation sequencing (NGS), depends on starting with nucleic acids that are accurately quantified and free from contaminants that could compromise results. Establishing a consistent quality control workflow helps laboratories improve reproducibility\u2026","rel":"","context":"In "General"","block_context":{"text":"General","link":"https:\/\/admin.acceleratingscience.com\/behindthebench\/general\/"},"img":{"alt_text":"A pipette drops a liquid into a petri dish with a dna sequence background, science concept. It suggests medical or genetic research.","src":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/08\/iStock-2216731026_petridish-scaled.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/08\/iStock-2216731026_petridish-scaled.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/08\/iStock-2216731026_petridish-scaled.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/08\/iStock-2216731026_petridish-scaled.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/08\/iStock-2216731026_petridish-scaled.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2026\/08\/iStock-2216731026_petridish-scaled.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]}],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/admin.acceleratingscience.com\/behindthebench\/wp-content\/uploads\/sites\/9\/2015\/12\/Fragment-Analysis.png","_links":{"self":[{"href":"https:\/\/www.thermofisher.com\/blog\/behindthebench\/wp-json\/wp\/v2\/posts\/7005","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.thermofisher.com\/blog\/behindthebench\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.thermofisher.com\/blog\/behindthebench\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.thermofisher.com\/blog\/behindthebench\/wp-json\/wp\/v2\/users\/120"}],"replies":[{"embeddable":true,"href":"https:\/\/www.thermofisher.com\/blog\/behindthebench\/wp-json\/wp\/v2\/comments?post=7005"}],"version-history":[{"count":0,"href":"https:\/\/www.thermofisher.com\/blog\/behindthebench\/wp-json\/wp\/v2\/posts\/7005\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.thermofisher.com\/blog\/behindthebench\/wp-json\/wp\/v2\/media\/7009"}],"wp:attachment":[{"href":"https:\/\/www.thermofisher.com\/blog\/behindthebench\/wp-json\/wp\/v2\/media?parent=7005"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.thermofisher.com\/blog\/behindthebench\/wp-json\/wp\/v2\/categories?post=7005"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.thermofisher.com\/blog\/behindthebench\/wp-json\/wp\/v2\/tags?post=7005"},{"taxonomy":"division","embeddable":true,"href":"https:\/\/www.thermofisher.com\/blog\/behindthebench\/wp-json\/wp\/v2\/division?post=7005"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}