- Materials
-
- Elution Buffer (EB)
- Short Fragment Buffer (SFB)
- Adapter Mix II (AMII)
- Consumables
-
- NEBNext Quick Ligation Module (NEB, E6056)
- Agencourt AMPure XP beads (Beckman Coulter, A63881)
- 1.5 ml Eppendorf DNA LoBind tubes
- Equipment
-
- Microfuge
- Magnetic rack, suitable for 1.5 ml Eppendorf tubes
- P200 pipette and tips
- P100 pipette and tips
- P20 pipette and tips
- P10 pipette and tips
- Vortex mixer
- Hula mixer (gentle rotator mixer)
- Ice bucket with ice
- Optional equipment
-
- Qubit fluorometer (or equivalent for QC check)
-
Adapter Mix II Expansion use
Protocols that use the Native Barcoding Expansions require 5 μl of AMII per reaction. Native Barcoding Expansions EXP-NBD104/NBD114 and EXP-NBD196 contain sufficient AMII for 6 and 12 reactions, respectively (or 12 and 24 reactions when sequencing on Flongle). This assumes that all barcodes are used in one sequencing run.
The Adapter Mix II expansion provides additional AMII for customers who are running subsets of barcodes, and allows a further 12 reactions (24 on Flongle).
-
Prepare the NEBNext Quick Ligation Reaction Module according to the manufacturer's instructions, and place on ice:
Thaw the reagents at room temperature.
Spin down the reagent tubes for 5 seconds.
Ensure the reagents are fully mixed by performing 10 full volume pipette mixes.
Note: Do NOT vortex the Quick T4 DNA Ligase.
The NEBNext Quick Ligation Reaction Buffer (5x) may have a little precipitate. Allow the mixture to come to room temperature and pipette the buffer up and down several times to break up the precipitate, followed by vortexing the tube for several seconds to ensure the reagent is thoroughly mixed.
-
Thaw the Elution Buffer (EB) and the Short Fragment Buffer (SFB) at room temperature, before mixing by vortexing. Then spin down and place on ice.
-
Spin down the Adapter Mix II (AMII), pipette mix and place on ice.
-
Perform the adapter ligation of the pooled and barcoded DNA. In a clean 1.5 ml Eppendorf LoBind tube, add the reagents in the following order:
Between each addition, pipette mix 10-20 times.
Reagent Volume Pooled barcoded sample 30 µl Adapter Mix II (AMII) 5 µl NEBNext Quick Ligation Reaction Buffer (5X) 10 µl Quick T4 DNA Ligase 5 µl Total 50 µl -
Ensure the components are thoroughly mixed by pipetting, and spin down.
-
Incubate the reaction for 10 minutes at room temperature.
-
Resuspend the AMPure XP beads by vortexing.
-
Add 20 µl of resuspended AMPure XP beads to the reaction and mix by pipetting.
-
Incubate on a Hula mixer (rotator mixer) for 10 minutes at room temperature.
-
Spin down the sample and pellet the beads on a magnet for 5 minutes. Keep the tube on the magnet until the eluate is clear and colourless, and pipette off the supernatant.
-
Wash the beads by adding 125 μl Short Fragment Buffer (SFB). Flick the beads to resuspend, then return the tube to the magnetic rack and allow the beads to pellet. Keep the tube on the magnet until the eluate is clear and colourless. Remove the supernatant using a pipette and discard.
-
Repeat the previous step.
-
Spin down and place the tube back on the magnet. Pipette off any residual supernatant. Allow to dry for ~30 seconds, but do not dry the pellet to the point of cracking.
-
Remove the tube from the magnetic rack and resuspend the pellet by pipetting in 15 µl Elution Buffer (EB). Spin down and incubate for 5 minutes at room temperature.
-
Pellet the beads on a magnet until the eluate is clear and colourless, for at least 1 minute.
-
Remove and retain 15 µl of eluate containing the DNA library into a clean 1.5 ml Eppendorf DNA LoBind tube.
Dispose of the pelleted beads
-
Quantify 1 µl of eluted sample using a Qubit fluorometer.
-
Optional actionIf quantities allow, the library may be diluted in Elution Buffer (EB) for splitting across multiple flow cells.
Additional buffer for doing this can be found in the Sequencing Auxiliary Vials expansion (EXP-AUX001), available to purchase separately. This expansion also contains additional vials of Sequencing Buffer (SQB) and Loading Beads (LB), required for loading the libraries onto flow cells.