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Electronic Supplementary Information Title: Ultrahigh-throughput sorting of microfluidic drops with flow cytometry Authors: Shaun W. Lim*, Adam R. Abate†,‡ Author affiliation: * UC Berkeley-UCSF Graduate Program in Bioengineering, University of California, San Francisco, San Francisco, California, USA †Department of Bioengineering and Therapeutic Sciences, California Institute for Quantitative Biosciences, University of California, San Francisco, California, USA. ‡ Corresponding author Address of corresponding author: Department of Bioengineering and Therapeutic Sciences, Schools of Medicine and Pharmacy, University of California, San Francisco, 1700 4th Street, Byers Hall 303C, San Francisco, CA 94158. Email: [email protected]. Phone number: 415-476-9819.
Electronic Supplementary Material (ESI) for Lab on a ChipThis journal is © The Royal Society of Chemistry 2013
Figure S1. FSC-A (Front Scatter-Area) against SSC-A (Side Scatter-Area) log-log plots and FITC channel fluorescence frequency histograms for 10,000 events. Device-made and shaken double emulsions contain 20 µg ml-1 FITC-BSA. Fluorescence plots are derived by gating events in defined areas on the FSC-A/ SSC-A plots. Here, we gate two main clusters of events—high FSC-A and SSC-A, which are the double emulsions, and low FSC-A and SSC-A, which are oil drops. Figure S2. Monitoring fluorescein dye leakage from double emulsions. The left column shows double emulsions made with 5% BSA added to the outer phase and 200 µg ml-1 Fluorescein in the inner phase, while the right column shows double emulsions omitting BSA in the outer phase. Fluorescein dye leaks so quickly out of the double emulsions that 20 min after generating them minimal fluorescence is observed when no BSA is added to the outer phase. Scale bars are 50 µm.
Electronic Supplementary Material (ESI) for Lab on a ChipThis journal is © The Royal Society of Chemistry 2013
Double Emulsions44.0%
Other23.0%
FITC-AFSC-A
0 102103103
104
104
105
105
103 1040
100
200
300Double emulsionsOther
Coun
t
SSC-
A
Total population GatedElectronic Supplementary Material (ESI) for Lab on a ChipThis journal is © The Royal Society of Chemistry 2013
1% Pluronic, 10% PEG+ 5% BSA
1% Pluronic, 10% PEG
20 mins
1 hour
2 hours
Note: Double emulsions for both sets of experiments were formed with the same set of single emulsion containing �uorescein at 2.5 µM
Electronic Supplementary Material (ESI) for Lab on a ChipThis journal is © The Royal Society of Chemistry 2013