Troubleshooting using control libraries
Observation
Possible cause
Recommended action
Ion Sphere
™
Test Fragments
are not present in the Test
Fragment Report section of the
run report, and library
sequencing is poor
• Chip loading was poor.
• Control Ion Sphere
™
Particles were not added
to the sample
1. Confirm that the Control Ion Sphere
™
Particles (included in the Ion S5
™
Installation Kit) were added.
2. If controls were added, contact Technical
Support.
Control Ion Sphere
™
Particles
are present in the run report,
but AQ20 throughput is poor
• The quality of the library
was poor.
• The quality of the template
preparation was poor.
Verify the quality of the library and template
preparations using quality assessment
procedures recommended in the appropriate
library and template preparation user guides.
1. Use the Human CEPH Genomic DNA
Control or Human CEPH Control 200
Library, included in the Ion S5
™
Controls
Kit (Cat. No. A27760), to prepare
template-positive ISPs with the
Ion OneTouch
™
2 Instrument, or the
Ion Chef
™
Instrument.
2. Use the ISPs in an Ion GeneStudio S5 run.
3. If AQ20 throughput is still below
specification, verify the quality of
unenriched and enriched ISPs to identify
a problem in template preparation.
4. If ISP quality is good, but AQ20 throughput
is below specification, contact Technical
Support.
Troubleshooting using Control Ion Sphere
™
Particles
To prepare Control Ion Sphere
™
Particles, provided in the Ion S5
™
Installation Kit, for
an installation or troubleshooting sequencing run:
1.
Create a Planned Run.
2.
Clean and initialize the Ion GeneStudio S5 Sequencer.
3.
Prepare the Control Ion Sphere
™
Particles for sequencing:
a.
Vortex the control ISPs for 5 seconds, then centrifuge for 2 seconds before
taking aliquots.
b.
Add 66 µL of control ISPs to an empty 0.2-mL PCR tube (non-polystyrene).
c.
Add 150 µL of Ion S5
™
Annealing Buffer to the tube.
4.
Anneal the sequencing primer to the enriched ISPs, then follow the remaining
procedures in Ion 540
™
Kit – OT2 User Guide (Pub. No. MAN0010850) to load a
chip and start the sequencing run.
Appendix B
Troubleshooting
Troubleshooting using control libraries
B
Ion GeneStudio S5 Instrument User Guide
45