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15 protocols using dsdna 915 reagent kit

1

Microbiome Analysis of Dermanyssus gallinae

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To analyze the D. gallinae microbiome, hypervariable V3/V4 regions of the 16S rRNA gene were sequenced. The libraries created by using 2-step tailed PCR (Supplementary Table 2) were checked using a Synergy H1 (BioTek, Winooski, VT, USA) and a QuantiFluor dsDNA System (Promega), and the qualities were verified using a Fragment Analyzer (Agilent, Santa Clara, CA, USA) and a dsDNA 915 Reagent Kit (Agilent). These libraries were sequenced using a Miseq sequencer (Illumina, Inc., San Diego, CA USA), and the raw data were deposited in the GenBank sequence database (Accession No. DRR376882–DRR377025).
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2

Gut Microbiome Profiling in Mice

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Mice were divided into two groups. Mice in each group were fed a CD or an ID for 14 days before feces collection. On day 15, all fecal samples obtained from mice of both groups were collected and stored at -80 °C until analyses of the gut microbial flora. A two-step tailed PCR method was used for the preparation of dsDNA libraries. Library concentrations were measured with a Synergy H1 microplate reader (BioTek) and a QuantiFluor dsDNA System (Promega). The library quality was assessed using a Fragment Analyzer (Advanced Analytical Technologies, Ankeny, IA, USA) with a dsDNA 915 Reagent Kit (Agilent, Santa Clara, CA, USA). Paired-end sequencing (2 × 300 bp) was performed on the Illumina MiSeq platform (Illumina, San Diego, CA, USA) with the MiSeq Reagent Kit v3 (Illumina). A sequence that completely matched the primer used was extracted by using the fast barcode splitter tool. After the trimming of the primer sequence, denoized sequences were analyzed using Qiime2.0 (2019.4). The EzBioCloud 16S database (28 (link)) was used to classify the bacterial species. These analysis procedures were performed at Bioengineering Lab. Co., Ltd. (Sagamihara, Kanagawa, Japan).
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Cervicovaginal Microbiome Analysis via 16S rRNA Sequencing

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Cervicovaginal microbiota were determined using extracted genomic DNA by PCR with universal 16S rRNA gene (rDNA) bacterial primers for the V3/4 region followed by MiSeq sequencing. Libraries were prepared by a two-step tailed PCR method. First, two PCR analyses were conducted, the first with Bakt_341F and Bakt_805R primers38 (link), the second with index primers. Library concentrations were measured using a Synergy H1 microplate reader (BioTek) and a QuantiFluor dsDNA System (Promega), and library quality was assessed with a Fragment Analyzer (Advanced Analytical Technologies, Ankeny, IA, USA) and a dsDNA 915 Reagent Kit (Agilent, Santa Clara, CA, USA), following the manufacturer’s instructions. Paired-end sequencing (2 × 300 bp) was carried out on the Illumina MiSeq platform (Illumina, San Diego, CA, USA) with the MiSeq Reagent Kit v3 (Illumina).
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4

Whole Genome Sequencing and de novo Assembly

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Whole genome sequencing was performed using DNBSEQ-G400 (MGI Tech Co., Ltd.). Libraries were prepared using IMGIEasy FS DNA Library Prep Set (MGI Tech Co., Ltd.) and fragments were validated using Fragment Analyzer and dsDNA 915 Reagent Kit (Agilent Technologies). Sequences were de novo assembled using SPAdes assembler version 3.15.5 42 (link). Genome annotation was performed using DFAST.
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5

Total RNA Extraction and RNA-Seq Analysis

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Total RNA was extracted from the samples using the RNeasy Mini Kit (Qiagen NV, Venlo, Netherlands). The integrity of the RNA was assessed using Agilent Technologies’ 2100 Bioanalyzer and RNA 6000 Nano Kit, which confirmed that all samples had an RNA integrity number of >9. The quality of the RNA was further assessed using the 5200 Fragment Analyzer System and the Agilent HS RNA Kit (Agilent Technologies). Subsequently, the DNA libraries were assembled using the MGIEasy RNA Directional Library Prep Set (MGI Tech). The quality of these libraries was assessed using the 5200 Fragment Analyzer System and the dsDNA 915 Reagent Kit (Agilent Technologies). The libraries were then circularized and converted into DNA nanoballs using the MGIEasy Circularization Kit and DNBSEQ-G400RS High-throughput Sequencing Kit (MGI Tech). Finally, sequencing was performed on a DNBSEQ-G400 instrument (MGI Tech) with a read length of 2 × 100 bp.
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6

Automated Illumina mRNA Sequencing Protocol

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We prepared the cDNA libraries using the Illumina® TruSeq® Stranded mRNA Sample Preparation Kit, following the manufacturer's protocol and using a Biomek NXᴾ Automated Workstation (Biomek NXP Span-8 by Beckman). In brief, poly-A-containing mRNA molecules were purified from 1 µg total RNA using poly-T oligo-attached magnetic beads. The purified mRNA was fragmented by adding the fragmentation buffer and then heated to 94°C in a thermocycler for 8 minutes. We primed the cleaved RNA fragments with random hexamers and used reverse transcriptase to synthesize first-strand cDNA.
Second-strand cDNA synthesis, end repair, A-tailing, adapter ligation, and enrich DNA fragments were carried out in accordance with the manufacturer supplied protocols. Each indexed cDNA library was verified and quantified using a dsDNA 915 Reagent Kit on a Fragment Analyzer (Agilent). We equally mixed 12 to 13 indexed cDNA libraries in each final library. The final libraries were quantified by realtime PCR using the KAPA Library Quantification Kit for Illumina Sequencing Platforms (Kapa Biosystems Ltd, SA), adjusted to 10 nM in water, and provided to the Montpellier Genomix platform (http://www.mgx.cnrs.fr/) for sequencing.
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7

Cervicovaginal Microbiota Analysis via 16S rRNA PCR

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Cervicovaginal microbiota were determined from extracted genomic DNA by the polymerase chain reaction (PCR) using universal 16S rRNA gene (rDNA) bacterial primers for the V3/4 region, followed by MiSeq sequencing.
13 (link) Libraries were prepared using a two‐step tailed PCR method. First, two PCR analyses were performed using Bakt_341F and Bakt_805R primers and index primers. Library concentrations were measured using a Synergy H1 microplate reader (BioTek Instruments Inc., Winooski, VT, USA) and a QuantiFluor dsDNA System (Promega), and library quality was assessed using a Fragment Analyzer (Advanced Analytical Technologies, Ankeny, IA, USA) and a dsDNA 915 Reagent Kit (Agilent, Santa Clara, CA, USA) according to the manufacturer's instructions. Paired‐end sequencing (2 × 300 bp) was performed on the Illumina MiSeq platform (Illumina, San Diego, CA, USA) using a MiSeq Reagent Kit v3 (Illumina).
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8

Bacterial 16S rRNA Gene Profiling

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The concentration of DNA solution was quantified using SynergyLX (BioTek, United States) and QuantiFluor dsDNA System (Promega, United States). DNA was amplified using the 2-step tailed PCR to target the V3-V4 regions of bacterial 16S rRNA. 1st PCR was performed with the 1st-341f_MIX (5′-ACACTCTTTCCCTACACGACGCTCTTCCGATCT-NNNNN-CCTACGGGNGGCWGCAG-3′) and the 1st 805r_MIX (5′-GTGACTGGAGTTCAGACGTGTGCTCTTCCGATCT-NNNNN-GACTACHVGGGTATCTAATCC-3′) primers. Subsequently, 2nd PCR was performed with the 2ndF (5′-AATGATACGGCGACCACCGAGATCTACAC-Index2-ACACTCTTTCCCTACACGACGC-3′) and the 2ndR (5′- CAAGCAGAAGACGGCATACGAGAT-Index1-GTGACTGGAGTTCAGACGTGTG-3′) primers. Each PCR reaction was carried out using Ex Taq HS (Takara Bio Co., Shiga, Japan). V3-V4 PCR products were purified using AMPure magnetic beads (Beckman Coulter, United States) and quantified with Synergy H1 (BioTek, United States) and QuantiFluor dsDNA System (Promega, United States). Next, the PCR products were pooled to construct the sequencing library and the quality of the library was confirmed using Fragment Analyzer and dsDNA915 Reagent Kit (Advanced Analytical Technologies, United States). Sequencing was performed using the MiSeq Reagent Kit v3 (Illumina, United States) under the condition of 2 × 300 bp.
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9

RNA-Seq Analysis of Flowering Mutant

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Flowers at the bloom stage were sampled and immediately frozen in liquid nitrogen. Three biological replicates for the WT and line #170 were used for RNA sequencing (RNA-Seq), and each biological replicate contained at least five blooming flowers. Total RNA was extracted with TRIzol reagent according to the manufacturer’s protocol. RNA quality was measured using a total RNA Quantus Fluorometer and QuantiFluor RNA system (Promega, USA). RNA quantity was assessed using a Qsep100 DNA Fragment Analyzer and RNA R1 Cartridge (BiOptic, Taiwan). The libraries were prepared using an MGIEasy RNA Directional Library Prep Set (MGI, China) according to the manufacturer’s instructions. The concentration of the libraries was measured by Qubit and a dsDNA HS Assay Kit (Thermo Fisher Scientific, USA), and the quantity was checked using Fragment Analyzer and a dsDNA 915 Reagent Kit (Advanced Analytical Technologies, UK). Paired-end reads (150 bp) were generated on the DNBSEQ-G400 at Bioengineering Lab. Co. (Kanagawa, Japan).
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10

RNA Extraction and Illumina Sequencing

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Total RNA was isolated from cells using the PureLink RNA Mini Kit (12183018A) according to the manufacturer’s instructions. RNA concentration was analyzed by Qubit RNA HS Assay Kit (Thermo Fisher Scientific, Waltham, MA, United States), and the purity was assessed using the Qsep100 DNA Fragment Analyzer and RNA R1 Cartridge (BiOptic, New Taipei City, Taiwan). Subsequently, total RNA was converted to cDNA and used for Illumina sequencing library preparation based on the KAPA Stranded mRNA-Seq Kit protocols (KAPA Biosystems, Wilmington, MA, United States). DNA fragments were then subjected to adapter ligation, where dsDNA adapters with 3’-dTMP overhangs were ligated to A-tailed library insert fragments by FastGene Adapter Kit (NIPPON Genetics, Bunkyo, Tokyo, Japan). The purified cDNA library products were evaluated using Qubit and dsDNA HS Assay Kit (Thermo Fisher Scientific, Waltham, MA, United States), followed by quality assessment using the Fragment Analyzer and dsDNA 915 Reagent Kit (Advanced Analytical Technologies, Ankeny, IA, United States) and finally by sequencing (2 × 75 bp) on NextSeq 500 (Illumina, San Diego, CA, United States).
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