Sanger Sequencing

Courier Service

Sample drop boxes are located in Partners II, Partners III, and the CVM Research Building for your convenience. We offer same-day service (by 5 pm) for Gold and Bronze sequencing, and next-day service for Platinum sequencing. Submissions requesting Courier Pickup MUST be  received by by 10:00 am that you are requesting sample collection. Your samples MUST be in the dropbox by 10:30 am for the pickup. Samples submitted after this time will be collected on the next business day.

Plate Sequencing

All plates submitted must be 96-well semi skirted PCR Plates (available for purchase at the GSL). Use of one of the following plate types is required for plate submission:

  • USA Scientific: Part Number 1402-9200
  • Genesee Scientific: Part Number 27-408

Please Label the Plate with:

  • The name matching your plate record
  • The level of sequencing service you are requesting (Platinum, Gold, or Bronze)

Single Tube Sequencing

  • Submit samples in 1.7mL tubes in a tube rack labeled with a piece of tape with the Customer Name, PI Name, and Date
  • Label tubes legibly on the top of the cap with initials and a number (Ex. GSL-1).
  • When submitting 32 or more single tubes for sequencing, users must submit samples in an 8-well strip tube or 96 well plate.
  • Make sure samples are in the same order in the rack as on your sample sheet.
  • If dropping off samples directly at the GSL, samples and submissions sheets must be received before 11:30 am for same day service (Gold and Bronze), or next-day service (Platinum). Late submissions will be run the following business day.
  • Please do not use any unusual character names as sample names. The only characters our ABI 3730 software will accept are letters, numbers, and underscores (no slashes, dashes, spaces, or other punctuation marks).

Platinum Sequencing

Note: Only Gold and Bronze Sequencing services are available for Next-Day data delivery. Platinum sequencing requires a two-day delivery window for the extra clean-up procedure.

PCR Clean-up through Capillary Run

When submitting plates for PCR clean-up, samples MUST be submitted in 96-well, semi skirted PCR plates with a reaction volume of at least 6uL. Products are purified using ExoSAP.

Templateng/ulTotal ng in 6ul
100-200bp1.3-4 ng/uL8-24 ng/6ul
200-500bp4-10 ng/uL24-80 ng/6uL
500-1000bp6.7-26.7 ng/uL40-160 ng/6ul
1000-2000bp13.3-53.3 ng/uL80-320 ng/6uL
>2000bp53.3-133.3 ng/uL320-800 ng/6uL
Single Stranded66.7-133.3 ng/uL400-800 ng/6uL
Double Stranded266.7-666.6 ng/uL1.6u20134 ug/6uL
Cosmid, BAC0.67-1.3 ug/uL4-8 ug/6uL

Gold Sequencing

Cycle Sequencing Reaction Set-up through Capillary Run

When sequencing at the Gold level, please submit your samples with 6.4 pmols of primer (either forward or reverse). 6.4pmols of primer is generally about 2 ul of 5 uM primer or 1 ul of 10 uM primer added to each well. DO NOT put both the forward and reverse primer in the same well. Please indicate clearly if you would like the GSL to add one of our primers (T7, SP6, M13F or M13R). If the GSL is adding primer, please bring your sample to a volume of 10ul. If you’ve included the primer, the final volume should be 12μl. This provides us with enough material to do 2 reactions in the event that a ‘redo’ is needed. Plate record submission and data retrieval are described below. Please label your plate with the exact same name as the plate record you submit online.

Template PCR ProductQuantity
Single Stranded100-200ng
Double Stranded400-1000ng
Cosmid, BAC1-2.0 ug

Bronze Sequencing

Cycle Sequencing Reaction Clean-up through Capillary Run

When sequencing at the Bronze level, users are responsible for completing their own Dye terminator sequencing reactions. Following submission of the plate, the GSL will perform the cycle-sequencing reaction clean-up and capillary run. Training can be provided and users can have access to the GSL for these procedures. Applied Biosystems Big Dye 3.1 is required for all sequencing reactions and can be purchased at the GSL. This mixture contains the Taq, 2.5X buffer, Mg 2+, dNTPs and dye-labeled ddNTPs. Simply add your primer (forward or reverse). Information about the reaction set-up and clean-up protocol is below:

Sequencing Steps

  1. Generation of Template (single-stranded, double stranded, plasmid, BAC, PCR products) preparation via commercial kits, phenol extraction, plasmid prep, etc.
  2. Purification of product – removal of primers, dNTPs, and other contaminants with ethanol precipitation, commercial kits, etc.
  3. Quantify DNA using agarose gel electrophoresis, spectrometry, etc.
  4. Amplification via cycle sequencing with Big Dye (purchase at GSL), primer, and template.
  5. Clean-up of cycle sequencing samples (done at GSL)
  6. Submit plate and plate record
  7. Data Retrieval

Sequencing Reaction Setup (BRONZE)

  • Template: See table below for quantity
  • Primer: 2 pmol of Forward OR Reverse
  • BigDye: Purchase at GSL (see Pricing page)
  • Sequencing Buffer: First tube free with purchase of BigDye at GSL
  • Water

10μL Final Volume

Template PCR ProductQuantity
Single Stranded50-100ng
Double Stranded200-500ng
Cosmid, BAC0.5-1.0ug
Bacterial Genomic DNA2-3ug

Full reaction (per sample)

5x Sequencing Buffer2ul
Primer (3.2picomoles)x ul
DNA Templatey ul
dH20z ul
Total Volume10ul

1/2 reaction (per sample)

5x Sequencing Buffer1uln
3.2 picomoles Primerx uln
DNAy uln
dH20z uln
Final Volume10uln

1/4 reaction (per sample)

5x Sequencing Buffer1.5uln
3.2 picomoles Primerx uln
DNAy uln
dH20z uln
Final Volume10uln

Cycle Sequencing

For Single and Double Stranded DNA:

96oC1 min
96oC10 sec
50oC5 sec25 cycles
64oC4 min