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Qubit dsdna hs assay kit

Manufactured by Illumina
Sourced in United States

The Qubit dsDNA HS Assay Kit is a fluorescence-based method for quantifying double-stranded DNA (dsDNA) in samples with high sensitivity. The kit uses a dye that binds specifically to dsDNA, allowing for accurate measurements of DNA concentration in a small volume.

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9 protocols using qubit dsdna hs assay kit

1

RNAseq Analysis of Sex-Specific Differences in ArKO Mice

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To investigate possible mechanisms for the robust decrease in physical activity in female ArKO mice, RNAseq data were collected from the NAc brain region for male and female WT and ArKO mice. The average total reads were 64,519,492.72 reads with an average of 56,945,785.76 reads after quality control (Supplementary Table 1). The average number of mapped reads was 56,501,086.96 translating to 99.214% of reads being mapped. We previously demonstrated this average number of reads to be sufficient for eukaryotic transcriptome data (Johnson et al., 2017 ). High-throughput sequencing was performed at the University of Missouri DNA Core Facility (Columbia, MO) as described previously (Ortega et al., 2019 (link)). Libraries were constructed following the manufacturer’s protocol with reagents supplied in Illimina’s TruSeq mRNA Stranded Library Preparation kit.
Briefly, the poly-A containing mRNA is purified from total RNA. RNA is fragmented and double-stranded cDNA is generated from fragmented RNA, and the index containing adapters are ligated to the ends. The final construct of each purified library was evaluated using the Fragment Analyzer automated electrophoresis system, quantified with the Qubit fluorometer using the Qubit HS dsDNA assay kit, and diluted according to Illumina’s standard sequencing protocol for sequencing on the NextSeq 500.
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2

RNA Extraction and High-throughput Sequencing Protocol

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The RNA extraction was performed using the Direct-zol RNA Miniprep Plus kit from Zymoresearch (catalog #R2071) according to the manufacturer’s instructions.
High-throughput sequencing was performed at the University of Missouri DNA Core Facility. Eighteen libraries were constructed following the manufacturer’s protocol with reagents supplied in the Illumina’s TruSeq mRNA stranded sample preparation kit. The sample concentration was determined by Qubit fluorometer (Invitrogen) using the Qubit HS RNA assay kit, and the RNA integrity was checked using the Fragment Analyzer automated electrophoresis system. Briefly, the poly-A containing mRNA was purified from total RNA (1 µg), RNA was fragmented, double-stranded cDNA generated from fragmented RNA, and the index containing adapters ligated to the ends. The amplified cDNA constructs were purified by the addition of Axyprep Mag PCR Clean-up beads. The final construct of each purified library was evaluated using the Fragment Analyzer automated electrophoresis system, quantified with the Qubit flourometer using the Qubit HS dsDNA assay kit, and diluted according to Illumina’s standard sequencing protocol for sequencing on the NextSeq 500. The sequencing length was single read at 75 bases.
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3

RNA-seq Analysis of DPP4 Knockout AML Cells

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RNA obtained from sorted BM AML cells of two DPP4+/+ and two DPP4−/− AML cells transplanted mice, was purified with QIAGEN miRNeasy Mini Kit. The sample concentration was determined by Qubit fluorometer (Invitrogen, Waltham MA) using the Qubit HS RNA assay kit, and RNA integrity was assessed using the Fragment Analyzer automated electrophoresis system. Next, poly-A containing mRNA was purified from total RNA (1mg), RNA was fragmented, double-stranded cDNA was generated from fragmented RNA, and the index-containing adapters were ligated to the ends. Libraries were constructed following the manufacturer’s protocol with reagents supplied in Illumina’s TruSeq mRNA stranded sample preparation kit. The amplified cDNA constructs were purified by addition of Axyprep Mag PCR Clean-up beads. The final construct of each purified library was evaluated using the Fragment Analyzer automated electrophoresis system, quantified with the Qubit fluorometer using the Qubit HS dsDNA assay kit, and diluted according to Illumina’s standard sequencing protocol for sequencing on the NextSeq 500. High-throughput sequencing was performed at the University of Missouri DNA Core Facility.
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4

RNA Extraction and Sequencing Protocol

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Total RNA was extracted using the TRIzol® kit (Invitrogen, Carlsbad, CA, USA). The integrity and quality of RNA were assessed using 1.0% agar gel electrophoresis and the NanoDrop 2000 (Thermo Fisher Scientific, USA). An NEBNext® Ultra™ RNA Library Prep Kit for Illumina® was used to construct the RNA-Seq libraries. The sample library concentrations were evaluated using the Qubit® 2.0 fluorimeter with the Qubit dsDNA HS Assay Kit before sending to Novogene (City, Country) for sequencing on the Illumina NovaSeq 6000 System.
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5

WGS Genomic DNA Extraction and Sequencing

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For WGS, genomic DNA was extracted from pure cultures of Streptococcus spp. using the DNeasy Blood and Tissue kit (Qiagen, Valencia, CA, USA) according to the manufacturer’s instructions. Sample DNA concentrations were determined using a Qubit dsDNA HS assay kit (Invitrogen, Carlsbad, CA, USA), and DNA samples were diluted to 0.2 ng/µL. Sample libraries were prepared using the Illumina Nextera XT DNA Library Prep Kit (Illumina, San Diego, CA, USA), followed by dilution to a concentration of 2 nM; the concentration of libraries was measured using the Qubit dsDNA HS assay kit. Samples were sequenced using a MiSeq Reagent Kit V2 (500 cycle) cartridge (Illumina) after loading 600 µL of the 10 pM pooled libraries.
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6

Microbial DNA Extraction and Sequencing

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Microbial DNA was extracted from the filters using the DNeasy PowerWater Sterivex Kit (Qiagen, Hilden, Germany) following the manufacturer’s guidelines. DNA concentration and purity were assessed using a spectrophotometer (Eon microplate spectrophotometer, BioTek, Shoreline, WA, USA). Genomic DNA libraries were prepared using the Nextera XT DNA Library Preparation Kit (Illumina, San Diego, CA, USA). Libraries were quantified using the Qubit dsDNA HS Assay Kit and sequenced on an Illumina NovaSeq 6000 platform to generate 150 bp paired-end reads.
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7

Whole Transcriptome Amplification and RNA-Seq

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cDNA synthesis and PCR amplification was performed according to the modified version of the Whole Transcriptome Amplification (WTA2, SigmaAldrich, St. Louis, MO, USA) kit [45 (link)]. Amplicons were purified using the MSB® SPIN PCRAPACE purification kit (Stratec Biomedical, Birkenfeld, Germany), according to manufacturer’s protocol. The concentration of the purified DNA was quantified using the Qubit dsDNA HS assay kit, according to the manufacturer’s protocol and then diluted to 1.2 ng/µL.
DNA libraries were prepared using the Nextera XT DNA library preparation kit (Illumina, San Diego, CA, USA) as per the manufacturer’s instructions, and libraries were purified following the Agencourt® AMPure® PCR purification protocol. The concentration of the purified library was quantified using a Qubit dsDNA HS assay kit, according to the manufacturer’s instructions. Then, the DNA library size distribution and quality were evaluated using an hsDNA chip on a Bioanalyzer platform (Agilent Technologies, 2009, Santa Clare, CA, USA). Sequencing was performed using the Illumina NextSeq platform for paired-end sequencing with a base length of 2 × 150 bp, and an average of 9,304,652 reads were retrieved per sample.
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8

NGS Sequencing of DNA Samples

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A concentration of 100 ng of each sample was used for NGS sequencing. This was performed at the Molecular Biology laboratory of University of Catania on a Illumina MiSeq platform according to the manufacturer’s instructions provided in the Illumina DNA Prep – (M) Tagmentation for Illumina® (Ref. 20018707, Illumina, Inc., 92122, San Diego, CA, USA). Indexes were provided with Nextera™ DNA CD Indexes Illumina® (24 Indexes, 24 Samples) (Ref. 20019105, Illumina, Inc., 92122, San Diego, CA, USA).
Libraries were quantified and their quality evaluated using both the fluorometric Qubit dsDNA HS Assay Kit (Ref. Q32851, Invitrogen, Carlsbad, CA 92008, USA) and the Agilent® High Sensitivity DNA Kit (Ref. 5067-4626).
Denature and dilute libraries were performed following the “Denature and Dilute Libraries Guide” protocol provided by Illumina®, choosing 8,5 pM as the loading concentration. Finally, sequencing was performed using the MiSeq Reagent Kits v3 (Ref. 15043895, Illumina, Inc., 92122, San Diego, CA, USA). The Sample Sheet was created using the Local Run Manager v3 software, and following the instructions in the Local Run Manager v3 Software Guide provided by Illumina (Software Guide provided by Illumina (Local run manager generate FASTQ analysis module workflow guide, 2018) ).
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9

Single-cell Whole Genome Amplification and Library Preparation

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Unless otherwise indicated, scWGA products were manually fragmented using SureSelect XT HS Enzymatic Fragmentation Kit (Agilent), and libraries for Illumina sequencing were created using SureSelect XT HS2 DNA Reagent Kit (Agilent) manually or using automation with Agilent Bravo, according to manufacturer’s guidelines. For PTA, a subset of scWGA products were used without fragmentation to create libraries using ResolveDNA Library Preparation Kit (BioSkryB) kit, according to BioSkryB guidelines. Each library was quantified by Qubit dsDNA BR or HS Assay kits and assessed by TapeStation using D1000 or HS D1000 DNA tapes (Agilent). After quality control, libraries were pooled together prior to sequencing, and their final concentration determined using Qubit dsDNA HS Assay Kit, HS D1000 tapes on TapeStation and qPCR (QuantaBio qPCR Library Quantification or NEBNext Library Quant Kit for Illumina). The pooled libraries were sequenced on NextSeq 2000 (200 or 300 cycles, Illumina) or NovaSeq SP v1.5 (300 Cycles, Illumina) using paired-end configuration and including 2% PhiX. For three cells (one dMDA, two PTA), library preparation was repeated and each one sequenced separately, but the bam files were merged for Preseq, Ginkgo, and Copykit.
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