Illumina DNA Methylation Library Preparation


Next-generation sequencing is a powerful means to profile DNA methylation at the single-nucleotide resolution when it is combined with bisulfite conversion of DNA either before or after library creation.

Exposure of DNA to sodium bisulfite results in the conversion of cytosine (C) – but not methylated cytosine (C*) – to uracil (U). Subsequent amplification of DNA during PCR converts U to T. Consequently, bisulfite conversion results in the change of C residues in DNA to T, leaving *C unchanged. Once such conversion has been accomplished, the original methylation state – C or C* – can be read out as the presence of a C vs T at a given CpG site.


Contact Aaron Becker:


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Service Scale Unit UMN External
Reduced Representation Bisulfite Sequencing (RRBS).¹
A “traditional” DNA methylation library creation 1-12 sample $235.66 $272.18
method utilizing bisulfite conversion after 13-48 sample $165.06 $194.14
standard DNA shearing-based library creation. 49-any sample $137.86 $164.42
The method uses kits and protocols from New England Biolabs.        



There are a large variety of other methods for the measurement of DNA methylation in DNA, including whole-genome methods, methods based on sequence capture of CpG islands, and targeted methods. Please inquire for more details. (


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How to Order

Please contact for project specifications.

Once project details are finalized, complete appropriate submission form for submitting samples or submitting client-made libraries and email to


Illumina Sequencing Request Form (Libraries)

Illumina Sequencing Request Form (Samples)

Shipping Instruction

Samples should be frozen and shipped on dry ice in a 96-well plate. We recommend using plate tape to seal the wells. Place the plate inside of a plastic bag prior to placing on dry ice. Please give advance notice of submission date and time so staff can be prepared to receive samples. If shipping samples from outside the University of Minnesota, ship via express shipping carrier on dry ice to the address below:

Samples can be dropped off at one of our laboratory locations.

1-202 Nils Hasselmo Hall (Minneapolis campus)

1-210 Cancer & Cardiovascular Research Building (Minneapolis campus)

20 Snyder Hall (St. Paul campus)

If shipping samples, the following address should be used.

Please send the tracking information to

University of Minnesota Genomics Center
1475 Gortner Avenue
28 Snyder Hall
St. Paul, MN 55108


What is the turnaround time?

Generally, turnaround is 6-8 weeks for standard NGS projects. However, please contact for specific project turnaround time.