Emergence of antibiotic resistance from multinucleated bacterial filaments.


Chen Y, Abrams ES, Boles TC Pedersen JN Flyvbjerg Austin RH Sturm JC. H. “Emergence of antibiotic resistance from multinucleated bacterial filaments.” Phys Rev Lett. 2015 May 15;114(19):198303. Epub 2015 May 15. (2015).


We demonstrate that a microfabricated bump array can concentrate genomic-length DNA molecules efficiently at continuous, high flow velocities, up to 40 μm/s, if the single-molecule DNA globule has a sufficiently large shear modulus. Increase in the shear modulus is accomplished by compacting the DNA molecules to minimal coil size using polyethylene glycol (PEG) derived depletion forces. We map out the sweet spot, where concentration occurs, as a function of PEG concentration and flow speed using a combination of theoretical analysis and experiment. Purification of DNA from enzymatic reactions for next-generation DNA-sequencing libraries will be an important application of this development.

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Last updated on 02/26/2016