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5 protocols using kapa hyperpure beads

1

Long-read gDNA Sequencing Protocol

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Extraction of genomic DNA from cells was done using the DNeasy Blood and Tissue kit from Qiagen according to the manufacture's instructions. Extracted gDNA was quantified using the Nanodrop reader and gel electrophoresis.
gDNA was fragmented by sonication with a Bioruptor sonicator for 30 cycles of 5 s ON–90 s OFF, using low intensity settings. gDNA was then purified with the Zymo DNA Clean & Concentrator™-5 columns (Zymo Research, D4013) and size selected with 0.4 × volume of KAPA HyperPure Beads (Roche, 08963835001) to exclude small DNA fragments. 1 μg of sheared gDNA was used for library preparation using Ligation Sequencing Kits (Oxford Nanopore Technologies, LSK109 and LSK110) according to the manufacturer’s specifications. Samples were sequenced on a MinION sequencer on R9 Flow Cells (Oxford Nanopore Technologies FLO-MIN106D), using the MinKNOW software v19. Flowcells were washed and reloaded with the Flow Cell Wash Kit (Oxford Nanopore Technologies EXP-WSH003) to increase sequencing depth obtained per flowcell. Average read N50 for sequencing runs was 3 kb.
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2

Halite Metagenome Extraction and Sequencing

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Total DNA was extracted from 2 to 5 g of grounded halite using the DNeasy Powersoil DNA extraction kit (QIAGEN). The DNA was cleaned with 3× AMPure XP Beads (Beckman Coulter) before library construction. The KAPA HyperPlus kit (Roche) was used to construct the genomic libraries with 10 ng of DNA, following the manufacturer’s instructions and with the DNA from each nodule barcoded separately. Final library size selection was made with 0.5× and 0.7× KAPA HyperPure beads (Roche) ratio to recover fragments 300–500 bp in length. Five libraries for Salar Grande and 3 for the other locations were paired-end sequenced by Novogene (https://en.novogene.com/) with 150 bp reads length using the Illumina NovaSeq 6000 platform.
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Comprehensive DNA Extraction and Sequencing

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For FFPE samples, genomic DNA was extracted from ten tumor sections of 5 μm using QIAamp DNA FFPE Tissue Kit (Qiagen GmbH). For blood samples, DNA was extracted from peripheral blood lymphocytes (PBL) using a blood genomic DNA Extraction Kit (centrifugal column method) (Tiangen Biotech (Beijing) Co., Ltd). For fresh tumor tissues, DNA was extracted using MagPure FFPE DNA LQ Kit F (Magen Biotechnology Co., Ltd). DNA was quantified using the Qubit 4.0 fluorometer and Qubit dsDNA HS Analysis Kit (Thermo Fisher Scientific, Inc.) according to the manufacturer's instructions. 5× WGS fragmentation mix, 10× WGS fragmentation buffer, T4 DNA Ligase, 5× rapid ligation buffer (Tiangen Biotech (Beijing) Co., Ltd.), KAPA HiFi HotStart Readymix, KAPA Library Amplification Primer Mix (Roche molecular systems, Inc.) were used for library construction. Then, the library was purified by KAPA HyperPure Beads (Roche molecular systems, Inc.). Hybridization capture was carried out using the combined probe of KAPA HyperExplore Max and KAPA HyperExome (Roche molecular systems, Inc.). PCR amplification was carried out for seven to eight cycles according to the input amount of the hybridization library. DNA sequencing was performed on Illumina Novaseq 6000 (Illumina, Inc.) system with an average depth of 650×.
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4

Magnetic Bead-Based DNA Cleanup Protocol

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Magnetic beads were sometimes used to clean the extracted DNA products. We used KAPA HyperPure Beads (Roche, Basel, Switzerland) and Select‐a‐Size DNA MagBead (Zymo Research, Irvine, California, USA) to clean two HMW DNA samples extracted from D. blotianum (Table 1). The volume ratio of beads to sample and the cleanup procedures followed the manufacturer's protocols. The post‐cleanup A260/A230 and A260/A280 values indicated that the beads improved the purity of the DNA extractions (e.g., A260/A230 increased from 1.26 to 2.26; Table 1). Some established protocols also use magnetic beads to purify and concentrate HMW DNAs (Mayjonade et al., 2016 (link); Russo et al., 2022 (link)). The cleaned extractions retained DNA fragments of acceptable length for long‐read sequencing (D. blotianum in Table 1), although we did not compare the DNA sizes before and after the cleanup. In the case of the Nephrolepis biserrata (Sw.) Schott gametophyte, a high‐concentration salt solution (1/10 volume of 3 M NaOAc) was added to the cool isopropanol to reduce the precipitation of polysaccharides (Nishii et al., 2022 (link)). With this high‐salt treatment, the A260/A230 of the resultant DNA extraction was improved to 1.49, while the A260/A230 ranged from 0.29 to 1.11 in samples without any treatment.
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5

ASF Virus Pol19_53050_C1959/19 Isolation

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The ASF virus Pol19_53050_C1959/19 was obtained on the 5th day of the 3rd passage in PPAM cell culture. Then, 2 × 200 µL of the cell culture was subjected to DNA extraction with a QiAMP DNA Mini Kit (Qiagen, Hilden, Germany). Final elution of DNA from the column was performed in triplicate (3 × 30 µL). Obtained DNA (2 × 90 µL) was pooled and cleaned-up using KAPA Hyper Pure Beads (Roche, Basel, Switzerland), and recovered in 20 µL of DNAse/RNAse free water. The final concentration of total DNA was measured with Nanodrop (Thermo Fisher Scientific, Waltham, MA, USA) (15.5 ng/µL), A260/A280 factor reached 1.86. The dsDNA concentration was measured using a Qbit dsDNA High Sensitivity kit (Thermo Fisher Scientific, Waltham, MA, USA) and reached 8.52 ng/µL. The remaining three isolates were prepared as described earlier [2 (link)].
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