- Materials
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- Native Barcoding Kit 24 V14 (SQK-NBD114.24)
- 200 fmol (130 ng for 1 kb amplicons) DNA per sample to be barcoded
- Consumables
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- NEB Blunt/TA Ligase Master Mix (NEB, M0367)
- NEBNext Ultra II End repair/dA-tailing Module (NEB, E7546)
- NEBNext Quick Ligation Module (NEB, E6056)
- Eppendorf twin.tec® PCR plate 96 LoBind, semi-skirted (Eppendorf™, cat # 0030129504) with heat seals
- 1.5 ml Eppendorf DNA LoBind tubes
- 2 ml Eppendorf DNA LoBind tubes
- Nuclease-free water (e.g. ThermoFisher, AM9937)
- Freshly prepared 80% ethanol in nuclease-free water
- Qubit™ Assay Tubes (Invitrogen, Q32856)
- Qubit dsDNA HS Assay Kit (ThermoFisher, cat # Q32851)
- Bovine Serum Albumin (BSA) (50 mg/ml) (e.g Invitrogen™ UltraPure™ BSA 50 mg/ml, AM2616)
- Equipment
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- Hula mixer (gentle rotator mixer)
- Microplate centrifuge, e.g. Fisherbrand™ Mini Plate Spinner Centrifuge (Fisher Scientific, 11766427)
- Magnetic rack
- Microfuge
- Vortex mixer
- Thermal cycler
- Multichannel pipette and tips
- P1000 pipette and tips
- P200 pipette and tips
- P100 pipette and tips
- P20 pipette and tips
- P10 pipette and tips
- P2 pipette and tips
- Ice bucket with ice
- Timer
- Eppendorf 5424 centrifuge (or equivalent)
- Qubit fluorometer (or equivalent for QC check)
- Optional equipment
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- Nanodrop spectrophotometer
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For this protocol, we recommend using 200 fmol (130 ng for 1 kb amplicons) DNA per sample to be barcoded.
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Input DNA
How to QC your input DNA
It is important that the input DNA meets the quantity and quality requirements. Using too little or too much DNA, or DNA of poor quality (e.g. highly fragmented or containing RNA or chemical contaminants) can affect your library preparation.
For instructions on how to perform quality control of your DNA sample, please read the Input DNA/RNA QC protocol.
Chemical contaminants
Depending on how the DNA is extracted from the raw sample, certain chemical contaminants may remain in the purified DNA, which can affect library preparation efficiency and sequencing quality. Read more about contaminants on the Contaminants page of the Community.
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Third-party reagents
We have validated and recommend the use of all the third-party reagents used in this protocol. Alternatives have not been tested by Oxford Nanopore Technologies.
For all third-party reagents, we recommend following the manufacturer's instructions to prepare the reagents for use.
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Native Barcoding Kit 24 V14 (SQK-NBD114.24) contents
Note: We are in the process of reformatting our kits with single-use tubes into a bottle format and reducing the concentration of EDTA.
Single-use tubes format with higher EDTA concentration:
Higher concentration of EDTA with a clear cap.Bottle format with reduced EDTA concentration:
Reduced concentration of EDTA with a blue cap.Note: This Product Contains AMPure XP Reagent Manufactured by Beckman Coulter, Inc. and can be stored at -20°C with the kit without detriment to reagent stability.
Note: The DNA Control Sample (DCS) is a 3.6 kb standard amplicon mapping the 3' end of the Lambda genome.
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To maximise the use of the Native Barcoding Kits, the Native Barcode Auxiliary V14 (EXP-NBA114) and the Sequencing Auxiliary Vials V14 (EXP-AUX003) expansion packs are available.
These expansions provide extra library preparation and flow cell priming reagents to allow users to utilise any unused barcodes for those running in smaller subsets.
Both expansion packs used together will provide enough reagents for 12 reactions. For customers requiring extra EDTA to maximise the use of barcodes, we recommend using 0.25 M EDTA and adding 4 µl for library preps using the SQK-NBD114.24 kit and 2 µl for preps using the SQK-NBD114.96 kit.
Native Barcode Auxiliary V14 (EXP-NBA114) contents:
Note: This Product contains AMPure XP Reagent manufactured by Beckman Coulter, Inc. and can be stored at -20°C with the kit without detriment to reagent stability.
Sequencing Auxiliary Vials V14 (EXP-AUX003) contents:
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Native barcode sequences
Component Forward sequence Reverse sequence NB01 CACAAAGACACCGACAACTTTCTT AAGAAAGTTGTCGGTGTCTTTGTG NB02 ACAGACGACTACAAACGGAATCGA TCGATTCCGTTTGTAGTCGTCTGT NB03 CCTGGTAACTGGGACACAAGACTC GAGTCTTGTGTCCCAGTTACCAGG NB04 TAGGGAAACACGATAGAATCCGAA TTCGGATTCTATCGTGTTTCCCTA NB05 AAGGTTACACAAACCCTGGACAAG CTTGTCCAGGGTTTGTGTAACCTT NB06 GACTACTTTCTGCCTTTGCGAGAA TTCTCGCAAAGGCAGAAAGTAGTC NB07 AAGGATTCATTCCCACGGTAACAC GTGTTACCGTGGGAATGAATCCTT NB08 ACGTAACTTGGTTTGTTCCCTGAA TTCAGGGAACAAACCAAGTTACGT NB09 AACCAAGACTCGCTGTGCCTAGTT AACTAGGCACAGCGAGTCTTGGTT NB10 GAGAGGACAAAGGTTTCAACGCTT AAGCGTTGAAACCTTTGTCCTCTC NB11 TCCATTCCCTCCGATAGATGAAAC GTTTCATCTATCGGAGGGAATGGA NB12 TCCGATTCTGCTTCTTTCTACCTG CAGGTAGAAAGAAGCAGAATCGGA NB13 AGAACGACTTCCATACTCGTGTGA TCACACGAGTATGGAAGTCGTTCT NB14 AACGAGTCTCTTGGGACCCATAGA TCTATGGGTCCCAAGAGACTCGTT NB15 AGGTCTACCTCGCTAACACCACTG CAGTGGTGTTAGCGAGGTAGACCT NB16 CGTCAACTGACAGTGGTTCGTACT AGTACGAACCACTGTCAGTTGACG NB17 ACCCTCCAGGAAAGTACCTCTGAT ATCAGAGGTACTTTCCTGGAGGGT NB18 CCAAACCCAACAACCTAGATAGGC GCCTATCTAGGTTGTTGGGTTTGG NB19 GTTCCTCGTGCAGTGTCAAGAGAT ATCTCTTGACACTGCACGAGGAAC NB20 TTGCGTCCTGTTACGAGAACTCAT ATGAGTTCTCGTAACAGGACGCAA NB21 GAGCCTCTCATTGTCCGTTCTCTA TAGAGAACGGACAATGAGAGGCTC NB22 ACCACTGCCATGTATCAAAGTACG CGTACTTTGATACATGGCAGTGGT NB23 CTTACTACCCAGTGAACCTCCTCG CGAGGAGGTTCACTGGGTAGTAAG NB24 GCATAGTTCTGCATGATGGGTTAG CTAACCCATCATGCAGAACTATGC