Dna Quantification
Dna Quantification - Related Videos
08:03
Simultaneous Assessment of Cardiomyocyte DNA Synthesis and Ploidy: A Method to Assist Quantification of Cardiomyocyte Regeneration and Turnover
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Cited by 25 •
2016
Quantification of cardiomyocyte turnover is challenging. The protocol described here makes an important contribution to this challenge by enabling accurate and sensitive quantification of neo-cardiomyocyte nuclei generation and nuclei ploidy.
11:37
Simultaneous DNA-RNA Extraction from Coastal Sediments and Quantification of 16S rRNA Genes and Transcripts by Real-time PCR
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Cited by 24 •
2016
A protocol to quantify bacterial 16S rRNA genes and transcripts from coastal sediments via real-time PCR is provided. The methodology includes the co-extraction of DNA and RNA; preparation of DNA-free RNA; and 16S rRNA gene and transcript quantification via RT-q-PCR, including standard curve construction.
07:37
Circulating MicroRNA Quantification Using DNA-binding Dye Chemistry and Droplet Digital PCR
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Cited by 10 •
2016
A sensitive and accurate method for cell-free microRNAs quantification using a dye-based chemistry and droplet digital PCR technology is described.
10:47
High-Throughput Image-Based Quantification of Mitochondrial DNA Synthesis and Distribution
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2023
A procedure for studying the dynamics of mitochondrial DNA (mtDNA) metabolism in cells using a multi-well plate format and automated immunofluorescence imaging to detect and quantify mtDNA synthesis and distribution is described. This can be further used to investigate the effects of various inhibitors, cellular stresses, and gene silencing on mtDNA metabolism.
07:34
Quantification of Circulating Pig-Specific DNA in the Blood of a Xenotransplantation Model
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Cited by 2 •
2020
In this protocol, porcine specific primers were designed, plasmids-containing porcine specific DNA fragments were constructed, and standard curves for quantitation were established. Using species-specific primers, cpsDNA was quantified by qPCR in pig-to-mouse cell transplantation models and pig-to-monkey artery patch transplantation models.
FAQs
Ultraviolet (UV) absorbance estimates DNA from the amount of UV light absorbed by a sample, whereas fluorescence uses a dye whose signal increases as more DNA-bound dye is present. The methods therefore rely on different measurable signals: light absorption by the sample versus dye-associated fluorescence. Recognizing this distinction helps interpret concentration results within a biology experiment.
Quantitative PCR estimates target DNA by monitoring amplification in real time. This adds a target-focused measurement to approaches that assess DNA through overall ultraviolet absorbance or fluorescence signals. The amplification trace is therefore useful when the biological question concerns the amount of a particular DNA target, while the other approaches help characterize the sample more generally.
Purity indicates whether substances accompanying the DNA may compromise downstream reactions, not merely how much DNA is present. Contaminants can interfere with enzyme-based processes, so a sample with an apparently adequate concentration may still produce unreliable results. Considering purity together with concentration helps researchers judge whether the material is suitable for planned molecular biology experiments.
Before a sequencing, cloning, genotyping, or PCR experiment, researchers can measure the DNA amount, examine purity, and adjust the input so samples are normalized. This workflow connects the initial sample assessment to the requirements of the downstream assay. Consistent DNA inputs make comparisons between samples more meaningful and support more reliable, reproducible analyses.
DNA quantification supports several different experimental decisions. In sequencing and cloning, it helps researchers plan the amount of DNA entering the workflow; in genotyping and PCR, it supports consistent input among reactions. The shared purpose is not simply recording a concentration, but using that information to prepare comparable samples and reduce variation caused by unequal starting material.
Reliable biological comparisons depend on controlling how much DNA enters each analysis. Quantification provides the information needed to normalize inputs, while purity evaluation can identify contaminants that might disrupt enzyme-based reactions. Together, these checks improve the consistency of sequencing, cloning, genotyping, and PCR workflows, making results easier to compare and experiments more reproducible.