Abstract

We present a polymer-enhanced capillary transient isotachophoresis (PectI) selection methodology for acquisition of high-affinity (kinetically inert) DNA aptamers capable of recognizing distinct microbial cell surfaces, which requires only a single electrophoretic separation between particles (free cells and cells bound with aptamers) and molecules (unbound or dissociated DNA) in free solution.

Highlights

  • Rapid acquisition of high-affinity DNA aptamer motifs recognizing microbial cell surfaces using polymer-enhanced capillary transient isotachophoresis

  • We present a polymer-enhanced capillary transient isotachophoresis (PectI) selection methodology for acquisition of high-affinity DNA aptamers capable of recognizing distinct microbial cell surfaces, which requires only a single electrophoretic separation between particles and molecules in free solution

  • Whereas the analysis of bacterial cells by conventional capillary electrophoresis (CE) typically results in the appearance of multiple peaks with very low repeatability, we have recently developed a CE-based separation mode for bacterial cells, called ‘‘Polymer-enhanced capillary transient Isotachophoresis (PectI)’’, which yields a single peak per cell type with high repeatability.[3]

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Summary

Introduction

Rapid acquisition of high-affinity DNA aptamer motifs recognizing microbial cell surfaces using polymer-enhanced capillary transient isotachophoresis. We present a polymer-enhanced capillary transient isotachophoresis (PectI) selection methodology for acquisition of high-affinity DNA aptamers capable of recognizing distinct microbial cell surfaces, which requires only a single electrophoretic separation between particles and molecules in free solution.

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