Abstract
Characterizing polymorphisms on single molecules renders the phase of different alleles, and thus, haplotype information. Here, we describe a high-throughput method to genotype hundreds-of thousands single molecules in parallel using bead-emulsion haplotyping (BEH). Haplotyping via BEH is an emulsion-PCR-based method that was adapted to amplify multiple DNA fragments on paramagnetic, microscopic beads within a compartment formed by an aqueous-oil emulsion. This generates beads covered by thousands of clonal copies from several polymorphic regions of an initial DNA molecule that are then genotyped with fluorescently labeled probes. With BEH, up to three different polymorphisms (or more if several polymorphisms are within an amplicon) can be typed within a fragment of several kilobases in a singleexperiment, rendering haplotype information of a very large number of initial single molecules. The high throughput and digital nature of the method makes it ideal to quantify rare haplotypes or to assess the haplotype diversity in complex samples.
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Acknowledgments
This work was supported by the “Austrian Science Fund” (FWF) P25525-B13 and P 23811-B12 to I.T-B. We also want to thank our team and colleagues, especially Angelika Heissl, for her input in the manuscript.
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Palzenberger, E., Reinhardt, R., Muresan, L., Palaoro, B., Tiemann-Boege, I. (2017). Discovery of Rare Haplotypes by Typing Millions of Single-Molecules with Bead Emulsion Haplotyping (BEH). In: Tiemann-Boege, I., Betancourt, A. (eds) Haplotyping. Methods in Molecular Biology, vol 1551. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-6750-6_14
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DOI: https://doi.org/10.1007/978-1-4939-6750-6_14
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