Imperial College London

Professor Joshua B. Edel

Faculty of Natural SciencesDepartment of Chemistry

Professor of Biosensing & Analytical Sciences



+44 (0)20 7594 0754joshua.edel Website




Mr John Murrell +44 (0)20 7594 2845




442AChemistrySouth Kensington Campus






BibTex format

author = {Gielen, F and Butz, M and Rees, EJ and Erdelyi, M and Moschetti, T and Hyvonen, M and Edel, JB and Kaminski, CF and Hollfelder, F},
doi = {10.1021/acs.analchem.6b02528},
journal = {Analytical Chemistry},
pages = {1092--1101},
title = {Quantitative affinity determination by fluorescence anisotropy measurements of individual nanoliter droplets},
url = {},
volume = {89},
year = {2017}

RIS format (EndNote, RefMan)

AB - Fluorescence anisotropy measurements of reagents compartmentalized into individual nanoliter droplets are shown to yield high-resolution binding curves from which precise dissociation constants (Kd) for protein–peptide interactions can be inferred. With the current platform, four titrations can be obtained per minute (based on ∼100 data points each), with stoichiometries spanning more than 2 orders of magnitude and requiring only tens of microliters of reagents. In addition to affinity measurements with purified components, Kd values for unpurified proteins in crude cell lysates can be obtained without prior knowledge of the concentration of the expressed protein, so that protein purification can be avoided. Finally, we show how a competition assay can be set up to perform focused library screens, so that compound labeling is not required anymore. These data demonstrate the utility of droplet compartments for the quantitative characterization of biomolecular interactions and establish fluorescence anisotropy imaging as a quantitative technique in a miniaturized droplet format, which is shown to be as reliable as its macroscopic test tube equivalent.
AU - Gielen,F
AU - Butz,M
AU - Rees,EJ
AU - Erdelyi,M
AU - Moschetti,T
AU - Hyvonen,M
AU - Edel,JB
AU - Kaminski,CF
AU - Hollfelder,F
DO - 10.1021/acs.analchem.6b02528
EP - 1101
PY - 2017///
SN - 0003-2700
SP - 1092
TI - Quantitative affinity determination by fluorescence anisotropy measurements of individual nanoliter droplets
T2 - Analytical Chemistry
UR -
UR -
UR -
VL - 89
ER -